XNX Universal Gas Transmitter 
Supports the widest range of sensors on a common platform and offers a modular choice of inputs and outputs, saving customers time and money on wiring and material costs, installation, maintenance and operation.

XNX's advantage comes from a simple-to-use, low-maintenance universal platform that works with other safety equipment on a digital bus system, including Honeywell Analytics’ own Searchline Excel, Optima or other gas detectors, industry standard PLCs and third-party gas monitoring controllers.

XNX supports Electrochemical, Infrared and Catalytic Bead gas monitors and uses standard 4-20mA wiring and HART; options include Modbus, Fieldbus (pending) up to three relays and a local Hart Adapter for configuration and diagnostics using existing HART handheld devices. 

With 200+ unique configurations, XNX satisfies Class 1/Class 2 intrinsically safe, explosion-proof requirements in upstream/downstream oil, chemical, wastewater and other industries.

The enclosure is available in stainless steel or aluminum, with a marine-grade coating. Five threaded ports, available in metric or NPT versions, and ruggedized mounting options provide ultimate installation flexibility.  Instrumentation built on various sensing technologies can be attached locally to the transmitter or remotely with the appropriate accessories.

The XNX user interface provides Alarm, Fault and configuration support via a large dot matrix display and LED indicators. Icons supported by seven language selections are used to ensure ease of operation around the world.

Features & Benefits Accessories Technical Library Image Gallery

High performance

• Flammable gas detection 0 to 100% LFL/LEL

• Point IR with heated optics provides immunity to poisoning and no hidden faults

• Open-path IR flammable gas detection in LEL-m measurement

• Electrochemical cell offers toxic gas detection in ppm

• IR cell provides CO2 and combustible gas monitoring


Flexible Operation

• 3 versions - supports mV (Catalytic Bead and IR Cell), Electrochemical Cell and IR (point and open-path) gas detection

• Multi-Purpose Detector (MPD) with field serviceable mV, Catalytic bead and IR Cell capability

• 4-20mA with HART® as standard

• Multiple communications options include up to 3 relays, MODBUS® and FOUNDATION® H1 Fieldbus (pending)

• Optional local IS port for handheld HART configurator


Easy to Use

• Large, backlit, easy-to-view LCD display offers multisensory indicators (visual icons, colored buttons, text, etc.) to display gas and sensor readings

• User interface supported by 8 selectable languages (English, Spanish, German, Italian, Portuguese, French, Russian, Chinese)

• Self-test and fault indication features

• Non-intrusive, one-man operation

• Quick calibration with auto-inhibit


Easy to Install

• 3 or 4 wire operation, source, sink or isolated

• Use with conduit or cable installations

• Simple plug-in sensors and replaceable cells

• NEMA 4X IP66 rated for rugged indoor/outdoor use


Cost Effective

• Minimal training required

• One-man operation

• Plug-in sensor replacement

• All necessary accessories included



• Offshore Oil & Gas production platforms

• Onshore Oil terminals

• Refineries

• Gas Transmission

• Gas Distribution

• LNG terminals

• Gas storage terminals

• Chemical plants

• Petrochemical plants

• Solvent recovery operations

Pipe Mount Kit - 1226A0358
For use on pipes from 50-100mm (2-6 inches) in diameter. The kit includes: Pipe mount bracket, (2) carriage bolts, nuts and lock washers.

Remote EC Sensor Mounting Kit - SK3RMK
The remote sensor mounting kit (SK3RMK) allows the XNX EC sensors to be remotely mounted via an IS cable kit, up to 15 meters (50 feet) from the transmitter. The kit includes 15 meters of shielded cable, cable glands and remote terminal box. The cable can be cut to the required length and terminated at the remote terminal box.

Ceiling Mount Bracket Kit - 1226A0355
The optional ceiling mount bracket kit allows XNX to be mounted to a ceiling. The kit includes: (2) stainless steel ceiling mount brackets, bolts and nuts.

Duct Mount Kit - 3001A0408 and MPD Interface Adapter - 1226A0382
The duct mounting kit (3001A0408) can be used with the EC sensor to allow detection of flammable O2, CO, H2 and H2S gasses in ducts. When combined with the MPD interface adapter (1226A0382), the duct mounting kit can accommodate the MPD to detect flammable gases in a duct application. The duct mount kit includes the adapter, gasket and required fasteners. The MPD interface adapter includes only the adapter and requires the 3001A0408 duct mount kit.

Calibration Gas Flow Adapter
The calibration gas flow adapter is used to apply calibration test gas to the sensor. It push fills onto the bottom of the sensor and can be fitted without removing the weatherproof cover.
- 02000-A-3120 - MPD
- 02000-A-1645 - Sensepoint
- 00780-A-0035 - 705

Weatherproof Cap
The weatherproof cap protects the XNX sensors from harsh weather.
- Included - XNX EC
- 02000-A-1640 - MPD
- 02000-A-1640 - Sensepoint
- 00780-A-2076 - 705

Collecting Cone
The collecting cone improves detection of lighter-than-air gasses such as Hydrogen and Methane.
- 02000-A-1642 - MPD
- 02000-A-1642 - Sensepoint
- 02000-A-1642 - 705

Remote Gassing Kit- 1226A0354
The remote gassing kit enables gas to be applied remotely for performing functional response checks. Kit includes 50' Teflon® tubing, mounting bracket, tube cap and device adapters in ¼" and 1/8" ID to attach to bump test ports on the weatherproof cap of your device.

Please enter your email address to download restricted documents from Honeywell Analytics.

Please check here if you wish to receive future communications from Honeywell Analtics, including notices of product updates or other promotional or technical information.

We use this information in strict accordance with our Privacy Statement.

  Restricted Documents
Date Title Type File Size
06 Oct 10 Engineering Specifications Manual / Supplement 208 kb
17 Jan 11 XNX Product Overview 1,747 kb
17 Jan 11 XNX Training Presentation 8,885 kb
03 Mar 11 XNX Foundation Fieldbus Manual Manual / Supplement 2,695 kb
03 Mar 11 XNX Safety Manual Manual / Supplement 3,389 kb
26 Mar 13 XNX Quick Start Guide Manual / Supplement 7,150 kb
09 May 14 XNX Technical Manual Manual / Supplement 25,318 kb
 Download Document

 Gas Detection Explained

 Honeywell Corporation

 Follow us!

Stay connected with us on Twitter, LinkedIn and YouTube!

Follow us on Twitter: @HoneywellGas Follow us on LinkedIn: honeywell-analytics Subscribe to our Youtube channel: honeywellanalytics