Month: August 2025

Product Overview

Searchpoint Optima Plus is an advanced infrared point type hydrocarbon gas detector suitable for potentially explosive environments. With its infrared detection principle, it has the characteristics of fast response, fault safe operation, etc., which can ensure factory compliance, personnel safety, and maximum uptime of the production process. Compared with traditional electrocatalytic gas detectors, it can reduce daily maintenance and overall cost of ownership.

Global application foundation: Based on over 40 years of design, manufacturing, installation, and maintenance experience, more than 100000 infrared point type hydrocarbon gas detectors have been installed worldwide, with a wide range of application scenarios, from light industry to demanding offshore petrochemical environments.

Typical applications: including environments where catalytic bead toxins or inhibitors may exist, as well as harsh environments that require extended daily maintenance intervals, such as offshore oil and gas platforms, floating production storage and offloading (FPSO) vessels, oil tankers, onshore oil and gas terminals, refineries, LNG/LPG bottling plants, etc.

Detectable gases: Over 100 types of gases and vapors can be detected. For specific lists, please consult the customer support team or local distributors.

Core advantages

Advantages of infrared technology: It has the characteristics of fault safe operation, fast response speed, reduced daily maintenance, not affected by catalytic toxins, long service life, and can work in inert environments.

Product Features:

Accumulated experience in installing over 100000 units worldwide, with higher reliability.

Optional HART ®  The protocol outputs through 4-20mA.

Can detect various hydrocarbon gases, including solvents.

No moving parts, higher reliability; The self compensating optical system enhances stability and is not affected by long-term component drift.

Capable of remote functional gas testing and certified for hazardous areas in North America and Europe.

Enhance false alarm elimination capability, with pollution optical warning to improve uptime, dynamic heating control to ensure no condensation or undetected faults in the optical system.

Improved diagnostic functions, integrated event logs, reduced power consumption, and certified through various hazardous area classification schemes such as ATEX, UL, CSA, IECEx, etc.

Core Technologies and Components

Optical module: The 4-channel (dual compensation) optical module is the core, which not only compensates for external environmental changes like the 2-channel design, but also compensates for long-term component drift such as infrared light sources and detectors, providing the most stable optical design.

Microprocessor: controls the operation of the detector, and its signal processing and algorithms reach new heights in false alarm elimination, providing the highest level of operational integrity.

Heating optical system and dynamic heating control: The heated optical components are monitored by intelligent electronic devices, which have energy-saving functions and can eliminate condensation accumulation.

Remote gas injection unit: The optional remote gas injection unit is installed in the optical path at the factory and can remotely inject functional test gases to verify detector performance.

Sampling system and accessories

Remote gas sampling system: For remote or difficult to access locations, flow enclosures can be equipped and integrated into the gas sampling system, providing single point and multi-point systems suitable for hazardous and non hazardous areas.

Main accessories:

Sunshade/Rain Protection: Standard multifunctional accessories to protect the detector from extreme environmental impacts and ensure reliable operation.

Storm Barrier: Optional barrier to reduce wind chill, salt, and dust accumulation in high wind exposure applications.

Standard weather protection: Standard equipment, achieving the best balance between waterproof/dustproof and response speed.

Dust barrier: Installed inside the standard weather protection, it additionally prevents dust and pollutants from entering the light path.

Gas injection cover: can confirm the performance of the detector, closely matched with standard weather protection, and can be installed without special tools.

Calibration cap: used to achieve accurate calibration of detectors.

XNX Universal Transmitter: Provides local display and non-invasive access through magnetic switches, with HART capability ®  Communication output and optional Modbus, Foundation fieldbus, or relays.

HALO junction box: Ex e certified junction box with LED halo for local visual status indication, optional non-invasive HART ®  Interface.

Pipeline installation kit: Installation plate device, which can install the detector in the pipeline/ventilation system without removing it from the pipeline system for functional gas testing.

On site inquiry tool: The multifunctional handheld interrogator (SHC-1) is a certified debugging/maintenance tool for hazardous areas, which can reconfigure detectors to adapt to different gases and perform fault diagnosis. It can also be used for raw Searchpoint Optima and Searchline Excel (open circuit gas detectors), reducing operator training.

Terminal/Installation Accessories: Provide a full range of hazardous area certified Ex e and Ex d junction boxes, as well as SHC-1 protective devices, to provide electrical protection for SHC-1 when using conventional terminal enclosures.

HART ®  communication protocol

Protocol advantage: HART ® Highway Addressable Remote Transformer is a widely used digital communication protocol that allows users to obtain real-time data, status indicators, and diagnostic information from smart field devices by superimposing digital signals on existing analog signals, without the need for additional field wiring, helping to reduce costs. If dedicated handheld devices are not required, engineers can use a single HART ®  Handheld devices access all HART devices on site ®  Enable the device and query HART at any position in the current loop ®  Signal, diagnostic information can be obtained without the need to go to the site, reducing maintenance costs.

The detector supports functions such as viewing gas readings, configuration, and diagnostic information, conducting collision testing, mA loop calibration, gas calibration, simulating alarms, faults, or warnings, setting device tags, IDs, and descriptions, viewing activity warning/fault and event history, forcing mA output to a specific level for testing, configuring real-time clock, configuring suppression, warning, and over range levels, configuring alarm thresholds, changing target gases, and password protected access.

Technical specifications

Project/Details

Measurement range: 0-100% LEL, calibrated for various hydrocarbon gases and vapors, providing different measurement ranges and solvent calibrations for special applications

Signal output: 4-20mA automatic sensing sink or source, suppression: 1-3mA (default 2mA), warning: 0-6mA (default 3mA *), fault: 0mA (HART) ®  Unit adjustable to 1mA, over range: 20-21.5mA (default 21mA)

Digital output: optional multi-point Modbus RS485 via XNX, optional HART ®  Through 4-20mA output (HART) ®  Version 7)

Material: 316 stainless steel

Weight: 1.6kg

Precision Optima Plus (hydrocarbons): baseline<± 1% FSD, 50% FSD<± 2% FSD; Optima Plus (ethylene): baseline<± 2% FSD, 50% FSD<± 3% FSD

Linearity:<5% FSD

Response time: T50<3 seconds, T90<4 seconds (methane)

Operating and certification temperature range: -40 ° C to+65 ° C * *; CU-TR-EX (Russia) certification – XTC version, certified temperature range -60 ° C to+65 ° C

Long term stability (as defined in EN 60079-29-1): baseline methane 100% LEL range: ≤± 2% FSD; Ethylene 100% LEL range: ≤± 4% FSD; 50% FSD methane 100% LEL range: ≤± 4% FSD; Ethylene 100% LEL range: ≤± 5% FSD

Drift within temperature range (-40 ° C to 65 ° C): baseline ≤ ± 2% FSD; 50% FSD methane 100% LEL range: ≤± 0.131% FSD/° C; ethylene 100% LEL range: ≤± 0.078% FSD/° C

Pressure change impact: 0.1% (reading)/mbar

Power supply 18-32Vdc: (nominal 24Vdc), maximum<4.5W

Environmental Protection: IP 66/67

Diagnosis (and recalibration): Certified handheld interrogator, XNX, or optional HART ®  communication

Safety certification: ATEX, UL/CSA, IECEx, CU-TR-EX (Russian Customs Union) and other certifications

Performance certification: EN 60079-29-1, CSA C22.2 152., FM ANSI/ISA-12.13.01., Russian mode approval (metrology) – XTC version, etc***

Functional Safety: IEC61508 Safety Integrity Level 2

EMC compliance: EN 50270:2006, EN 50271:2010

Ship certification: Marine Equipment Directive (MED), DNV, BV, ABS, Lloyd’s Register and other type approvals

Installation Options

Installation options: Provides multiple installation configurations to adapt to different connection requirements in hazardous and safe areas, such as connecting to controllers, DCS/PLC, SCADA systems, etc., supporting HART ®、 Modbus and other communication methods.

Security Warning and Information

The installation must comply with the standards recognized by relevant national authoritative institutions, and reference should be made to EN 60079-14 and EN 60079-29-2 in the European region.

It is strictly prohibited to open the casing when powered on or when there may be explosive atmospheres present.

Operators need to be aware of the measures to be taken when the gas concentration exceeds the alarm level, and must not modify the product structure, otherwise it may render critical safety and certification requirements ineffective.

Only trained personnel are allowed to carry out internal operations of the product. Its measurement function has not obtained ATEX certification, and it is not allowed to rely on the backlight status indication of the OELD display screen for safety related operations. The equipment must not operate in an environment with an oxygen content exceeding 21%.

Special safety conditions for use (increased safety Ex e version)

Each terminal can be connected to a maximum of one single or multiple wires on either side, unless multiple wires are connected in an appropriate manner.

The insulation layer of the wire connected to the terminal should be suitable for the corresponding voltage and extend within 1mm of the terminal throat.

All used and unused terminal screws should be tightened to between 0.5Nm and 0.6Nm, and terminals can only be installed and wired using cables recommended by IECEx KEM 10.0093U.

Disposal and Environmental Protection

The product should be disposed of in accordance with local regulations, including materials such as the shell (aluminum alloy or 316 stainless steel), lid (aluminum alloy or 316 stainless steel, glass).

The product must be disposed of through appropriate WEEE disposal facilities and cannot be treated as general industrial or household waste.

Product Overview

Basic Introduction

OELD is a certified junction box for hazardous locations, suitable for detectors with 4-20mA output, and can be used in conjunction with Searchpoint Optima Plus or Searchline Excel series gas detectors.

Provide local visual status indication and Bluetooth low-energy interface, which can be configured and maintained through Bluetooth enabled mobile devices, certified by ATEX and IECEx, suitable for Zone 1 (gas) or Zone 21 (dust) hazardous areas, and the explosion-proof version also has cULus certification, suitable for Class I Zone 1 or Class II Zone 1.

There are 5 entrances (M25 or 3/4 “NPT depending on the version) and 3 certified plugs, while the Ex e version of the OELD only has 5 M25x1.5 entrances.

Structure and function

There are two grounding connection points and an electronic module with two pluggable terminal blocks inside the shell, used to connect the field and detector wiring.

Featuring four-color backlighting (green, yellow, red, blue) and a customized 7-segment liquid crystal display (LCD), different backlight colors represent different states, such as green for normal operation or warning, red for alarm, etc.

Options

Including pipeline installation kit (1226A0358), which can install OELD on pipelines with diameters ranging from 2 “to 6” (50 to 150mm); Ceiling installation bracket kit (1226A0355), used for ceiling installation; Sun visor (94000-A-1006), made of 316 stainless steel, can protect OELD and related detectors from direct sunlight.

Installation related

Site selection and positioning

The placement of gas detectors should follow the recommendations of gas diffusion experts, process equipment experts, safety personnel, and engineering personnel, and record the protocol for determining the detector location.

Installation designers should refer to IEC/EN 60079-29-2 and other national practice standards, as well as the site selection recommendations for specific locations in the gas detector technical manual.

Mechanical Installation

OELD can be installed in various ways through integrated mounting pads, such as on flat walls Unistrut ®  On the bracket, use the optional pipe installation kit to install on the pipeline or utility pole, or use the ceiling installation bracket kit to install on the ceiling.

When installing, it is necessary to consider the correct direction of the detector, ensure that the installation bolts are fully tightened, and use appropriate locking washers.

electrical installation

The detector can be installed directly or remotely to the OELD, and some detectors have corresponding junction boxes for remote installation.

The installation steps include removing the cover, taking out the electronic module, installing cable glands or conduit fittings, installing detectors (with different installation methods for different entrance versions), sealing unused cable entrances, making electrical connections, reinstalling the display module and cover, etc.

Electrical connection

Terminal block definition

Terminal block 1 (TB1) and terminal block 2 (TB2) have different markings, colors, and functions for each terminal. For example, terminal 1 of TB1 is – V (black) and is used for auxiliary power supply.

The increased safety (Ex e) version uses terminal blocks of specific manufacturers and types, while the explosion-proof (Ex d) version is black and the increased safety version is green. They must not be mixed, otherwise the product certification will be invalidated.

Wiring diagram

Provided OELD and Searchpoint Optima Plus、Searchline Excel、Searchline Excel Cross-Duct（XD） Wait for the wiring diagram of the detector, as well as the connection method of the detector with the current sink and current source configuration.

Grounding connections should avoid grounding loops. The OELD has two internal grounding points, and the on-site cable shielding layer should be connected to the instrument grounding in the control room. The internal and external grounding points of the OELD have corresponding specifications and connection requirements.

Power supply and cables

The OELD requires a voltage supply of 18-32Vdc (nominal 24Vdc) with a maximum power consumption of 2W, taking into account the voltage drop caused by cable resistance to ensure the minimum required supply voltage at the detector.

The cable should be suitable for hazardous area classification and comply with relevant regulations. It is recommended to use industrial grade shielded field cables. The allowable wire size for terminals is 0.2-2.5mm ² (24-12AWG), and the rated wire temperature should be greater than 80 ° C. The terminal tightening torque should be 0.5Nm to 0.6Nm.

Configuration

Configurable parameters

Including local alarm indication threshold (can be set between 5 and 65% FSD, default 20% FSD), mA input level setting (to match the detector’s mA output curve), and OELD universal display settings (such as full-scale range, measurement unit, gas name, etc.).

configuration process

Configure by running the OELD App on a mobile device, including steps such as launching the application, logging in, searching for nearby OELD units, selecting and confirming connections, etc.

After completing the configuration or changing the settings, the configuration should be read back and verified to ensure that the changes are correct.

Operation

Startup and self-test

The startup and self-test sequence takes about 60 seconds, during which display testing, backlight testing, internal hardware and memory checks, etc. will be performed. After completion, it will enter normal operating mode.

normal operation

During normal operation, the LCD backlight indicates the detector status based on the 4-20mA output of the detector, and different current ranges correspond to different backlight colors and flashing states.

The display screen displays gas concentration information (in graphical and numerical form) and other information during normal operation. At low temperatures, the refresh rate of the display screen will automatically decrease. At extremely low temperatures, the screen clarity may decrease, but it can return to normal after the temperature is restored.

communication model

Equipped with Bluetooth Low Energy (BLE) interface, it supports non-invasive connection with mobile devices running the OELD App, and can also communicate with specific detectors through RS-485 interface.

Honeywell Analytics SHC-1 handheld interrogator and SHC protection device can also be used to connect with relevant detectors, but attention should be paid to relevant warnings and precautions.

OELD Mobile Application

Installation and operation

The OELD mobile application can run on Android 4.3 (Jelly Bean) or higher operating systems that support Bluetooth Low Energy (BLE) and can be downloaded and installed from the Google Play Store.

The first launch requires reading the End User License Agreement, logging in or registering an account. Registration requires an Internet connection and at least one OELD device’s QR code.

Connection and Configuration

Can connect to OELD devices that have already been registered to the user account. The connection steps include clicking on relevant buttons on the main screen of the application, selecting the device, scanning the QR code (if access to restricted devices is required), confirming the connection, etc.

Multiple parameters of the OELD device can be configured, as well as parameters of detectors such as Searchpoint Optima Plus and Searchline Excel connected to the OELD, and calibration operations can also be performed (specific detectors).

Maintenance and troubleshooting

maintenance

Regularly inspect the OELD and cables for physical damage, clean the glass windows with a damp cloth, and do not use solvents or abrasive cleaners. The OELD has no user repairable parts.

It is recommended to check the configuration and operation of the equipment at least once a year, and the gas detector connected to the OELD should be checked and calibrated according to its operating instructions.

The replacement of the display module requires following specific steps, including power-off, removing the cover and electronic module, replacing the module, etc. After replacement, it needs to be reconfigured.

Malfunctions and warnings

Different display messages and codes correspond to different types of faults or warnings, such as “Over Rang” (W-01) indicating an over range warning, “Comm Err” (F-01) indicating an internal communication fault, etc., with corresponding remedial measures.

Specifications and ordering information

specifications

The material is marine grade aluminum alloy or 316 stainless steel (with 5-coated painted surface treatment), and the weight varies depending on the material. The size is 159x197x114mm, and the number and type of cable entrances vary depending on the version. There are corresponding terminals, storage and working temperatures, humidity, display information, visual indicators, power supply, interfaces, protection levels, and certifications.

ordering information

We provide models and descriptions of different versions of OELD smart junction boxes and related accessories (such as universal service kits, terminal block groups, plugs, installation kits, sunshades, etc.). We warn that it is necessary to obtain service kits that match the OELD version, otherwise the product certification will be invalidated.

Certification and Warranty

Certification and Approval

Including EU conformity declaration, hazardous area certification (such as ATEX, IECEx, cULus, Inmetro, etc.), performance certification, wireless certification, etc. Different certifications have corresponding certificate numbers and scope of application.

Warranty Summary

Honeywell Analytics guarantees that the OELD will be free of component and process defects, repairable or replaceable under correct use for a period of 24 months from the date of shipment, excluding consumables, normal wear and tear, accidental damage, etc. Claims must be made within the warranty period.

Product Overview

The Honeywell Series 3000 MkII and MkIII are 2-wire loop powered toxic gas and oxygen detectors suitable for potentially explosive environments. They come in explosion-proof and intrinsic safety versions, capable of comprehensively monitoring toxic gas and oxygen hazards. They are suitable for indoor and outdoor installation and have excellent versatility.

MkII: Equipped with a flameproof casing and sensor connections that are inherently safe, it is mainly suitable for Zone 1 locations. When paired with an optional remote installation kit, the sensor can be installed in Zone 0 environments.

MkIII: It needs to be used in conjunction with a separate suitable intrinsic safety barrier and can be used in Zone 0, Zone 1, Zone 2, Zone 20, Zone 21, or Zone 22 locations.

Core advantages

Reliable detection: using mature electrochemical sensing technology and Surecell ™  Electrochemical batteries are suitable for high temperature and high humidity environments, with long sensor life and patented “Reflex” sensor verification and diagnostic functions.

Reduce installation costs: Equipped with integrated surface mount lugs, providing optional horizontal or vertical pipe mounting brackets, explosion-proof transmitters allow for on-site wiring to be laid together with other non intrinsic safety instruments, plug-in sensors do not require wiring and can replace Series 2000 series for refurbished installation.

Reduce debugging costs: The sensor recognition function can automatically configure the transmitter, support non-invasive configuration, and be equipped with plug and play factory configured sensors.

Reduce maintenance costs: Intrinsically safe sensor connections allow for hot swapping, reducing downtime. Users can set calibration frequencies and have integrated fault diagnosis software and menu/icon driven calibration programs.

Regulatory compliance: Complies with regulatory requirements in Europe (ATEX), the United States (UL), Canada (c-UL), South America (Inmetro), International (IECEx), and other regions.

Installation related

Installation method: Integrated installation ears can be used for wall mounting, or optional pipeline installation kits can be used for pipeline installation (horizontal or vertical). It also supports pipeline installation, remote installation, etc.

Electrical installation: ATEX/IECEx version uses 2 M20 cable entries, UL/c-UL version uses 2 three-quarters “NPT conduit entries, equipped with suitable plugs to seal unused entries, including weatherproof caps to withstand the harshest outdoor conditions.

Cable requirements: Depending on the length of the installed cable, cables with a cross-sectional area of 0.5mm ² (20AWG) to 2.0mm ² (approximately 14AWG) should be used to ensure the minimum operating voltage of the detector.

Size: The transmitter size is 164mm x 201mm x 99mm (6.4 “x 7.9” x 3.9 “), and other related components have their own specific sizes.

Weight: LM25 aluminum alloy material weighs approximately 1.7kg (3.75lbs), 316 stainless steel material weighs approximately 3.7kg (8.16lbs).

Electrical specifications

Power supply: The MkII is powered from 17Vdc (± 10%) to 32Vdc (maximum), with a maximum current of 22mA (over range); The MkIII is powered from 10Vdc (± 10%) to 30Vdc (maximum), with a maximum current of 22mA (out of range).

Signal output: 0-100% full range 4-20mA, fault status 3mA, calibration expiration can choose to turn off or output 3mA, maximum over range 22mA, toxic sensor suppression can choose 3mA or 4mA, oxygen sensor suppression can choose 3mA or 17.4mA.

Cable length: The maximum cable length of MkII depends on the minimum guaranteed power supply voltage of the controller, the minimum operating voltage of the detector, the maximum current consumption of the detector, the input impedance of the controller, and cable resistance, etc; When calculating the maximum cable length for MkIII, the limiting factors are total capacitance and inductance, which need to consider the fixed capacitance and inductance of barriers and isolators, as well as the capacitance and inductance per meter or kilometer of the cable.

Wiring schematic: MkII and MkIII have their own different wiring schematic, and MkIII also provides some recommended barriers and isolators for use.

Technical parameters

Detectable gases: including oxygen (O ₂), hydrogen sulfide (H ₂ S), carbon monoxide (CO), sulfur dioxide (SO ₂), ammonia (NH ∝), and other gases, each with a corresponding optional full-scale range and default range.

Working temperature: Different certification versions and models vary. The ATEX/IECEX version MkII ranges from -20 ° C to+55 ° C (-4 ° F to+131 ° F), while the MkIII ranges from -40 ° C to+55 ° C (-40 ° F to+131 ° F); The UL/c-UL version is from -40 ° C to+55 ° C (-40 ° F to+131 ° F).

Working humidity: Continuous 20-90% RH (no condensation), intermittent 0-99% RH (no condensation).

Work pressure: 90-110kPa.

Storage conditions: 15 ° C to 30 ° C (59 ° F to 86 ° F), 30-70% RH (non condensing).

Protection level: IP66 (EN 60529), NEMA 4X.

Construction materials: The transmitter is made of epoxy coated aluminum alloy LM25 or 316 stainless steel, and the sensor is made of 316 stainless steel with PTFE filter.

Authentication information

MkII: UL/c-UL certification is applicable to Class I Zone 1 and Zone 2, Groups B, C, D, etc; ATEX and IECEx also have corresponding certifications.

MkIII: UL/cUL certification is applicable to Class I, Zone 1 and Zone 2, Groups A, B, C, D, etc; ATEX and IECEx also have corresponding certifications.

Remote sensor accessories: have also obtained relevant certifications such as UL/c-UL, ATEX, IECEx, etc.

The product complies with CE standards and follows ATEX Directive 94/9/EC, EMC Directive 2004/108/EC, EN 50270, etc.

Order Information

Complete components: consisting of transmitter and sensor, which need to be ordered separately.

Transmitter models: There are ATEX/IECEx certified versions, UL/CSA certified versions, Inmetro certified versions, each with aluminum alloy and stainless steel materials, as well as MkII and MkIII models.

Sensor model: All sensors are certified by ATEX, IECEx, UL, CSA (c-UL), and the gas type and range are specified by two digits. Different gases correspond to different models.

Optional accessories: including pipeline installation brackets, sun/rain protection devices, calibrated gas flow enclosures, collection cones, pipeline installation kits, remote sensor installation kits, etc.

Calibration gas: You can contact a Honeywell Analytics representative to obtain it.

Product Overview

Honeywell’s Sensepoint series of gas detectors covers combustible gas, toxic gas, and oxygen detectors, providing high-quality, low-cost solutions for industrial gas monitoring needs. They are suitable for new construction and renovation projects and demonstrate high performance and reliability in a variety of demanding applications.

Core advantage: Adopting mature sensor technology such as Surecell ™  Electrochemical sensors, anti poisoning catalytic beads, fast and reliable response, with a typical service life of 2-5 years for sensors; Certified by ATEX/IECEx, in compliance with the latest standards, with hazardous area use permit and corresponding performance; The protection level reaches IP65/67, which can be used in harsh environments; The factory preset operation is easy to replace, requires less training, and also provides various accessories such as weather caps, flow adapters, etc.

Adaptability: Suitable Ex d or Ex e certified junction boxes should be used to install in potentially explosive environments, with output that meets industry standards and can be connected to Honeywell Analytics controllers or third-party DCS/PLC systems.

Characteristics of different types of detectors

Combustible gas detector: available in% LEL or PPM detection range versions, providing industry standard mV bridge output, with a typical lifespan of over 5 years, and can be replaced directly upon expiration.

Toxic gas detector: pre calibrated, easy to install, providing industry standard 2-wire 4-20mA loop output; The user connection is Ex d type, and the front-end intrinsic safety (IS) design allows for live replacement of replaceable sensors without sintering, with a fast response speed to “viscous” gases such as chlorine and ammonia.

Installation details

Dimensions: There are differences in some dimensions between combustible gas (% LEL or PPM version) and toxic or oxygen versions, such as 90mm and 74mm for combustible gas detectors, and 56mm for toxic gas detectors.

Junction box and installation: Use appropriate Ex d or Ex e junction boxes for installation. The standard junction box provided by Honeywell Analytics includes a grounding continuity board to enhance RFI protection; The detector has multiple installation thread sizes to choose from to match local preferences, and can be used in conjunction with Honeywell Analytics’ various controllers or third-party control devices that accept its industry standard output signals.

Electrical connection: Different types of detectors have different wiring methods. The combustible gas% LEL version uses a 3-wire mV bridge circuit, the toxic or oxygen version uses a 2-wire 4-20mA (Sink) system, and the combustible gas PPM version uses a 3-wire mV bridge circuit.

Technical specifications

Covering multiple gases and detection ranges, detectors corresponding to different gases have differences in working temperature, working humidity, storage conditions, working pressure, preheating time, response time, power supply, signal output, linearity, working life, storage life, stability, weight, construction materials, protection level, certification details, etc.

For example, the working temperature of combustible gas 0-100% LEL version is -40 to+80 ° C (high temperature version -55 to+150 ° C), and the signal output is mV bridge; Hydrogen sulfide (H ₂ S) 20/50/100ppm version operates at temperatures ranging from -25 to+50 ° C, with a typical lifespan of 18 months.

In terms of certification, combustible gas detectors and toxic gas detectors comply with different ATEX/IECEx standards, and some also have Russian GOST certification and comply with relevant CE standards.

Order Information

Accessories: including terminal housing, right angle mounting bracket, Series 2000 weatherproof housing, collection cone, calibration flow housing component, catalytic bridge to 4-20mA converter, toxic gas calibration kit, threaded adapter, cable sealing sleeve and cap, etc. Each accessory has corresponding models.

Spare parts: mainly various electrochemical battery replacement kits, corresponding to different gases such as oxygen, sulfur dioxide, chlorine gas, carbon monoxide, etc., each kit has a specific model.

Sensors: Combustible gas sensors and various toxic gas and oxygen sensors, with multiple models available for selection based on gas type, detection range, and thread type.

Product Overview

Sensepoint XCD RFD is a remote flammable gas detector suitable for hazardous areas (Class I, Division 1, Groups B, C, D), supporting remote installation of sensors (up to 30 meters), detecting flammable gases through catalytic combustion technology, providing 4-20mA analog output and 3 programmable relays, optional Modbus communication function, non-invasive operation (magnetic rod activation) and explosion-proof certification, mainly used for safety monitoring of flammable gases in industrial scenarios.

Core functions and technical features

1. Detection capability

Applicable gases: flammable gases such as methane, propane, hydrogen, ethylene, etc. (catalytic combustion technology).

Sensor type:

705 standard LEL sensor: operating temperature -55 ° C to+80 ° C, UL and CSA certified.

705 HT High Temperature LEL Sensor: Operating Temperature -40 ° C to+150 ° C, UL Certified Only.

Performance parameters:

Detection range: 0-100% LEL, resolution 1% LEL.

Response time (T90):<25 seconds.

Accuracy: ± 1.5% LEL.

2. Output and Communication

Analog output: 4-20mA current signal (configurable as source or drain mode), output<1mA in case of fault, output 2mA or 4mA in suppression mode.

Relays: 3 programmable relays (default A1, A2, fault), supporting normally open/normally closed switching, contact capacity 5A@250VAC .

Optional Modbus RTU: communicates via RS485, supports 9600/19200 baud rates, can transmit data such as gas concentration and alarm status, and can be configured with slave addresses 1-247.

3. Operation and Configuration

User interface: LCD display screen, displaying gas concentration, alarm status, fault codes, etc., operated through magnetic stick activation buttons.

Menu function: Supports calibration, parameter configuration (range, alarm threshold, relay action, etc.), password protection (default 0000).

Calibration: Calibration flow housing is required, clean air is used for zero calibration, and 50% LEL standard gas is used for range calibration. It is recommended to calibrate once every 6 months.

Installation and wiring

1. Installation requirements

Environmental conditions: Operating temperature -40 ° C to+65 ° C (transmitter), humidity 10-99% RH (non condensing), protection level IP66.

Sensor installation: Remote installation requires the use of a junction box (such as 2430-0021), with a cable length of ≤ 30 meters, and the sensor sintered surface facing downwards to ensure IPX6 protection.

Explosion proof requirements: Cable entrances must be equipped with sealed joints, with a distance of ≤ 18 inches (45cm) from the detector, and grounding must be connected at a single point to avoid loops.

2. Wiring specifications

Power supply: 16-32VDC (nominal 24VDC), power consumption ≤ 5W.

Cable selection: It is recommended to use shielded twisted pair cables with a cross-sectional area of 0.5-2.5mm ² (20-13 AWG). Remote sensor cables must comply with the AWM2464 standard.

Terminal definition: including power supply, 4-20mA signal, relay, Modbus (optional), and sensor interface. Specific wiring needs to refer to the terminal table.

Calibration and maintenance

1. Calibration process

Zero point calibration: performed in clean air or using zero gas (such as compressed air).

Range calibration: Introduce 50% LEL standard gas and confirm the calibration value after stabilization.

Cross calibration: If using non target gas calibration, refer to the star rating table for adjustment (if using methane to calibrate ethylene, set the 62% LEL range).

2. Daily maintenance

Sensor replacement: Power off operation is required, and recalibration is required after replacement. The lifespan of the sensor is usually 36 months (affected by toxic substances such as silicone and sulfides in the environment).

Troubleshooting: By using fault codes (such as F02 indicating sensor failure and F03 indicating zero drift), common problems include wiring errors, power supply failures, and sensor malfunctions

Product overview

Sensepoint XCD is a fixed gas detector suitable for hazardous areas such as Zone 1/2 and Class I Division 1/2. It can detect flammable gases, toxic gases, and oxygen, and achieve safety monitoring through 4-20mA signal output and programmable relays. It supports Modbus communication (optional), non-invasive operation (magnetic rod activation), and explosion-proof certification. It is widely used in industrial scenarios such as petroleum and chemical industries.

Core functions and technical features

1. Detection capability

Applicable gases:

Flammable gases: methane, propane, etc. (catalytic combustion or infrared technology).

Toxic gases: hydrogen sulfide (H ₂ S), carbon monoxide (CO), hydrogen (H ₂), nitrogen dioxide (NO ₂), etc. (electrochemical technology).

Oxygen (O ₂): Detection concentration range 0-25% Vol (electrochemical technology).

Performance parameters:

Response time (T90): Flammable gas<25 seconds, toxic gas<65 seconds, oxygen<30 seconds.

Accuracy: ± 1.5% LEL (flammable gas), ± 20% or specific value (toxic gas).

2. Output and Communication

Analog output: 4-20mA current signal (configurable as source or drain mode), output<1mA in case of fault, output 2mA or 4mA in suppression mode (17.4mA in oxygen version).

Relays: 3 programmable relays (default A1, A2, fault), supporting normally open/normally closed switching, contact capacity 5A@250VAC .

Optional Modbus RTU: communicates via RS485, supports 9600/19200 baud rates, and can transmit data such as gas concentration and alarm status.

3. Operation and Configuration

User interface: LCD display screen, displaying gas concentration, alarm status, fault codes, etc., operated through magnetic stick activation buttons.

Menu function: Supports calibration, parameter configuration (range, alarm threshold, relay action, etc.), password protection (default 0000).

Calibration: A calibration cap (S3KCAL) is required, which supports zero and range calibration. It is recommended to perform it every 6 months.

Installation and wiring

1. Installation requirements

Environmental conditions: working temperature -40 ° C to+75 ° C, humidity 10-99% RH (non condensing), protection level IP66.

Installation position: Select according to the gas characteristics (such as lighter than air gas requiring a collection cone), and the sensor sintering surface should face downwards to ensure IPX6 protection.

Explosion proof requirements: Cable entrances must be equipped with sealed joints, with a distance of ≤ 18 inches (45cm) from the detector, and grounding must be connected at a single point to avoid loops.

2. Wiring specifications

Power supply: 12-32VDC (UL version) or 16-32VDC (ATEX/IECEx version), power consumption ≤ 5.5W.

Cable selection: It is recommended to use shielded twisted pair cables with a cross-sectional area of 0.5-2.5mm ² (20-13 AWG) and a maximum Modbus transmission distance of 1000 meters.

Terminal definition: including power supply, 4-20mA signal, relay, Modbus (optional) interface, specific wiring needs to refer to the terminal table.

Calibration and maintenance

1. Calibration process

Zero point calibration: performed in clean air or using zero gas (such as compressed air).

Range calibration: Introduce 50% of the full range standard gas and confirm the calibration value after stabilization.

Special requirement: The hydrogen sulfide sensor needs to be zeroed with compressed air to avoid the influence of humidity; Infrared sensors need to complete both zero and range calibration simultaneously.

2. Daily maintenance

Sensor replacement: Power off operation is required, and recalibration is needed after replacement. The lifespan of the sensor is usually 2-5 years (depending on the type).

Troubleshooting: By using fault codes (such as F02 indicating sensor failure and F03 indicating zero drift), common problems include wiring errors, power supply failures, sensor aging, etc.

Regular inspection: It is recommended to conduct a bump test every 6 months to ensure that the sensor responds properly

ATEX

ATEX/UKEX：

Certification numbers: UL 21 ATEX 2619X (transmitter), UL 21 ATEX 2620X (sensor head)

Protection level: II 2 GD Ex db IIC T6 Gb (-40 ° C to+65 ° C), Ex tb IIIC T85 ° C Db (-40 ° C to+65 ° C)

Additional requirement: Ensure static grounding to avoid sparks generated by friction.

IECEx：

Certification number: IECEx UL 21.0105X (transmitter), IECEx UL 21.0106X (sensor head)

Protection level: Ex db IIC T6 Gb (-40 ° C to+65 ° C), Ex tb IIIC T85 ° C Db (-40 ° C to+65 ° C).

UL/cUL：

Certification Number: E480011

Applicable area: Class I, Division 1/2（Groups B、C、D）、Class II, Division 1/2（Groups E、F、G）

Temperature range: -40 ° C to+65 ° C.

Performance and Security Certification

European standards:

EN 60079-29-1 (Flammable Gas Performance), EN 45544 (Toxic Gases), EN 50104 (Oxygen).

Other certifications:

Classification society certification (DNV, ABS, CCS, etc.), CE mark (compliant with EN 50270 electromagnetic compatibility standard).

Safety and Installation Fundamentals

Safety requirements: Installation must comply with local and national authoritative standards, and the complete “Sensepoint XRL User Manual” (available for download from Honeywell’s official website) must be read before operation.

Product version:

Analog (mA) output version: The terminals are defined as+24V DC/AC, 0V/24V AC, 4-20mA, and common terminal.

Modbus RTU output version: The terminal is defined as+24V DC/AC, 0V/24V AC, A (data+), B (data -).

Installation steps

Fixed detector: After determining the installation position, drill holes and fix the detector to the wall with suitable fasteners to avoid excessive tightening.

Cable connection:

Unscrew the front cover counterclockwise and smoothly pull out the main electronic module.

Remove the threaded protective sleeve and sealing components from the cable entrance, and install cable glands or conduits for the entrance in use.

Thread the cable through the glass, remove the terminal block and connect the wires according to the wiring diagram (wire size is 0.2-2.5mm ², it is recommended to use cold pressed terminals), and then reinstall the terminal block.

Grounding connection:

The internal grounding terminal is used to stabilize Modbus communication and resist RF interference, and the cable shielding layer needs to be single ended grounded (preferably at the controller end).

The external safety grounding terminal should be connected to the electrical safety ground to avoid grounding loops.

Complete installation: Tighten the sealing nut of the cable gland, reinstall the main electronic module and front cover, and tighten the grub screw to lock.

Status indication and Bluetooth connection

Meaning of status indicator light:

Normal: Blinks green every 20 seconds (can be set to stay on or off).

Alarm: Red flashing rapidly (gas concentration exceeds alarm threshold).

Fault: Yellow flashing rapidly (detector malfunction).

Bluetooth pairing: Blue flashing.

Bluetooth connected: Blue is constantly on.

Bluetooth connection steps:

Download and install the Sensepoint app from the Google Play Store, register an account, and log in.

Scan the QR code inside the detector packaging box or enter the activation code to associate with the device.

On the homepage of the application, click on “Detectors” to scan for available devices, select the detector with a flashing blue status light, and click on “Confirm Detector” to complete the pairing.

Technical specifications

Physical parameters: dimensions 118mm × 159mm × 93mm (4.4 × 6.2 × 3.6 inches), weight 1400g (3.1 pounds).

Power supply and power consumption:

Nominal voltage: 24V DC or 24V AC (50/60Hz), surge current<850mA.

Power consumption: mA version (toxic gas<1.5W, flammable gas<2.6W); Modbus version (toxic gas<1.0W, flammable gas<2.0W).

Output: Analog output is 0-22mA (configurable as sink or source mode); The digital output is Modbus RTU.

Environmental parameters:

Working temperature: -40 ° C to 65 ° C (-40 ° F to 140 ° F), storage temperature: 0 ° C to 30 ° C (32 ° F to 86 ° F).

Humidity: 0-99% RH (non condensing), flammable catalytic version needs to be within the range of 10-90% RH.

Protection level: IP66, NEMA 4X.

Cable entry: ATEX/IECEx version is M20, cULus version is three-quarters NPT.

Authentication information

ATEX (DEMKO 17 ATEX 1872X): II 2 GD, Ex db IIC T6 Gb, Ex tb IIIC T85 ° C Db, operating temperature -40 to+65 ° C.

IECEx (IECEx UL 17.0038X): Ex db IIC T6 Gb, Ex tb IIIC T85 ° C Db, operating temperature -40 to 65 ° C.

Product Overview

XNX Universal Transmitter is a comprehensive gas detection system launched by Honeywell, suitable for hazardous locations. It can be combined with various sensor technologies such as catalytic beads, electrochemical (EC), or infrared (IR) to detect gas hazards such as toxic gases, flammable gases, and oxygen deficiency. It supports multiple communication protocols and has flexible installation and configuration methods, aiming to provide reliable gas monitoring solutions for industrial scenarios.

Core functions and technical features

Sensor compatibility

Supports catalytic bead sensors (for detecting flammable gases), electrochemical sensors (for detecting low concentration toxic gases), and infrared sensors (for detecting gases within the infrared spectral range).

Compatible with various specific sensors, such as MPD (Multi Purpose Detector), 705 series, Sensepoint series, Searchpoint Optima Plus, Searchline Excel, etc.

Communication function

Standard communication: 4-20mA current loop HART digital communication, configurable as Sink, Source (3-wire system) or Isolated (4-wire system) electrical interfaces.

Optional communication interfaces: Relay (3 Form C contacts for alarm and fault indication), Modbus (supports RTU protocol, communicates through RS-485 physical layer), Foundation Fieldbus (digital communication system, supports multi device connection).

Operation and Configuration

User interface: Equipped with a custom backlit LCD display screen, non-invasive operation through magnetic wands, supporting 8 languages (English, Spanish, German, Italian, Portuguese, French, Russian, Chinese).

Menu functions: including configuration (language, date and time, sensor type, gas selection, etc.), testing (suppression, forced mA output, relay testing, etc.), information viewing (alarm/fault status, transmitter data, etc.), calibration, and other menus.

Security settings: Supports two-level password protection (Level 1 for daily maintenance and Level 2 for technical personnel and password management), requires resetting the factory default password to prevent unauthorized access.

Calibration and maintenance

Calibration types: including zero calibration, range calibration, functional gas testing (collision testing), mA output calibration, etc.

Sensor replacement: Detailed instructions on the replacement steps for MPD sensor cartridge and XNX EC sensor cartridge, which require recalibration after replacement.

Maintenance precautions: When handling sensors, attention should be paid to corrosion prevention, avoiding high temperatures and organic solvents, etc. Sensor scrapping must comply with environmental protection requirements.

Specification parameters

 Electrical specifications

Working voltage: EC/mV type is 16-32VDC (nominal 24VDC), IR type is 18-32VDC (nominal 24VDC).

Power consumption: varies depending on the configuration, such as XNX EC with a maximum of 6.2W and XNX IR (Excel) with a maximum of 13.2W.

Output load: 4-20mA output. The total load resistance should be less than 500 Ω, with a minimum of 200 Ω.

Environmental specifications

Working temperature: -40 ° C to+65 ° C (-40 ° F to+149 ° F).

Humidity: 0 to 99% RH (non condensing).

IP rating: IP66.

Physical specifications

Shell material: LM25 aluminum alloy (optional 316 stainless steel coating).

Size: 159 x 197 x 113.8 mm (6.138 x 7.75 x 4.48 inches).

Weight: Approximately 2.27kg (5lb) for aluminum alloy and 5kg (11lb) for stainless steel.

Warning and malfunction

Warning message: including power failure, abnormal temperature, calibration requirements, etc., detailing the applicable sensors, characteristics, and solutions for each warning.

Fault information: covering sensor faults, communication faults, internal faults, etc. Each fault has corresponding fault codes, characteristics, event history data, and solutions.

Information message: Record operation and status information such as forced relay mode startup, successful calibration, etc.

Certification and Warranty

Certification: Passed multiple certifications such as UL, CSA, FM, ATEX, IECEx, etc., suitable for different hazardous areas.

Warranty: XNX Universal Transmitter (excluding consumables) is covered by a 36 month warranty, XNX electrochemical sensor is covered by a 12 month warranty (from self commissioning or shipment, whichever comes first), and multi-purpose detector is covered by an 18 month warranty (from shipment).

Appendix Information

The HART protocol introduces the communication modes (point-to-point, multi station), wiring methods, device descriptor files, and operation menus of the HART interface.

Modbus protocol: describes the communication parameters, register definitions, and usage examples of the Modbus interface.

Control drawings: Wiring and installation drawings for different certified versions (UL/INMETRO, UL/CSA/FM, etc.) are provided.

Product Overview

This guide covers multiple industrial fixed gas and flame detection products under Honeywell, including various transmitters, detectors, controllers, and related accessories, suitable for gas leakage and flame monitoring in different industrial scenarios, aiming to provide safety assurance for industrial production.

Main product categories and characteristics

1. Explosion proof transmitter

XNX ™  Universal transmitter: supports multiple sensors, with modular input/output selection, integrated communication functions such as 4-20mA, HART, Modbus, etc., suitable for flexible integration and simple installation, and stable performance in harsh environments.

Sensepoint series: including Sensepoint XCD, Sensepoint XCD RTD, Sensepoint XCD RFD, etc., can detect flammable, toxic gases and oxygen. It adopts explosion-proof shell, supports 4-20mA and Modbus communication, and has the characteristics of non-invasive operation.

Series 3000 MkII and MkIII: Suitable for potentially explosive environments, supports remote sensor installation, and has advantages such as low power consumption and easy configuration.

2. Infrared transmitter

Searchpoint Optima Plus: Azardous area certified infrared combustible gas detector with fast response speed, high reliability, suitable for harsh environments, and insensitive to catalytic toxins.

Searchline Excel: Infrared open circuit combustible gas detector, available in short, medium, and long ranges, with a wide detection range and suitable for various industrial scenarios.

3. Flame detector

FSX series: including FS24X, FS20X, FS10, etc., using multispectral detection technology, can quickly detect flames and reduce false alarms, suitable for different hazardous areas.

SS series: such as SS4 series and SS2-AM series, with detection functions such as ultraviolet and infrared, suitable for various fire detection scenarios.

4. Gas detection controller

Touchpoint Pro: A modular flame/gas detection and control system that can be flexibly expanded, supporting multiple input/output modules and communication methods, suitable for centralized and distributed systems.

HA series: such as HA20, HA40, HA71, HA72, etc., can display and alarm multiple detection points simultaneously, with multiple communication and output functions.

5. Other products

RAEGuard 2 PID: Fixed photoionization detector for detecting volatile organic compounds (VOCs), easy to calibrate and maintain.

Midas ®  Extractive Gas Detector: an extraction gas detector that can detect multiple gases and supports Ethernet power supply and multiple output modes.

SPM Flex: Based on Chemcassette ®  The gas detector using tape technology can be used as a fixed and portable device, capable of detecting various sensitive gases.

Accessories and Services

Accessories: including calibration kits, power supplies, Horns&Strobes, mounting brackets, etc., to provide support for product installation, calibration, and operation.

Services: Honeywell provides installation, commissioning, calibration, maintenance, repair, and other services, with a global network of technical support resources that can provide 24/7 service (in the United States and Canada).

Product application

These products are widely used in various industries such as petroleum, chemical, power, warehousing, and automotive to monitor flammable and toxic gas leaks and flames, ensuring the safety of personnel and factories.

Product overview

The Honeywell Sensepoint XCD is a fixed gas detector suitable for industrial applications, capable of detecting flammable gases, toxic gases, and oxygen. It has a 3-wire 4-20mA output and RS485 MODBUS communication function. It is equipped with built-in alarm and fault relays, a local display screen, and can be fully configured through a non-invasive magnetic switch interface to protect personnel and factories from related gas hazards.

Electrical specifications

Input voltage range: 12-32VDC (nominal 24VDC)

Maximum power consumption: Depending on the type of gas sensor used, the electrochemical cell is 3.7W, the infrared sensor is 3.7W, and the catalytic sensor is 4.9W; the maximum surge current at 24VDC is 800mA

Current output: can choose sinking or sourcing mode

Relays: 3, 5A@250VAC , can choose between normally open or normally closed (switch) and power on/off (programmable); Alarm relay defaults to normally on/off, fault relay defaults to normally on/on

Communication: RS485, MODBUS RTU

Structure specifications

Material: The shell is made of epoxy coated aluminum alloy ADC12 or 316 stainless steel; The sensor is made of 316 stainless steel

Weight (approximately): Aluminum alloy LM25 is 4.4lbs; 316 stainless steel weighs 11lbs

Installation: Integrated installation board with 4 mounting holes suitable for M8 bolts; Optional pipeline installation kit, suitable for horizontal or vertical pipelines (diameter 1.5-3 inches, nominal 2 inches)

Cable entry: UL/cUL version includes 2 3/4 inch NPT conduit entries, providing suitable plug closure (if only 1 entry is used), sealed to maintain IP rating; ATEX/IECEx version includes 2 M20 cable entry points

Environmental Specifications

IP rating: IP66 (compliant with EN60529:1992)

Certification temperature range: -40 º F to+149 º F (-40 º C to+65 º C)

Detectable gas and sensor performance

Gas type user selectable full-scale range default range user selectable step size default calibration point response time (T90) (seconds) accuracy working temperature range default alarm point A1 default alarm point A2

Authentication

United States, Latin America, Canada: UL/c-UL – Class I Zone 1 Groups B, C, D, Class I Zone 2 Groups B, C, D, Class II Zone 1 Groups E, F, G, Class II Zone 2 Groups F, G, -40 ° C to+65 ° C

European international: IEC Ex d IIC Gb T6 (ambient temperature -40 º C to+65 º C), Ex tb IIIC T85 ° C Db IP66; ATEX Ex II 2 GD Ex d IIC Gb T6 (ambient temperature -40 º C to+65 º C), Ex tb IIIC T85 ° C Db IP66

Electromagnetic compatibility: CE: EN50270:2006, EN6100-6-4:2007

Performance: UL508; CSA 22.2 No.152 (flammable gases, excluding infrared sensors); ATEX，IEC/EN60079-29-1:2007，EN45544，EN50104，EN50271； China: PA type approval (transmitters and toxic gas sensors), “CCCF” Shenyang (flammable gas, approved by the fire department)