Starting at $748.00

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  • 3 Versions - supports (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
  • Simple plug-in Sensors and replaceable cells
  • Multiple communications options include up to 3 relays, Modbus® and FOUNDATION® H1 Fieldbus
  • 4-20 mA with HART® as standard
  • Optional local IS port for handheld HART configurator
  • NEMA 4X IP66 rated for rugged indoor/outdoor use
  • Five conduit entries for ease of installation
  • Large, backlit, easy-to-view LCD display offers multisensory indicators (visual icons, colored buttons, text, etc.) to display gas and Sensor readings
  • Self-test and fault indication features
  • Quick calibration with auto-inhibit
  • UL, CSA, FM, DEMKO, DEKRA, InMetro, TUV, ABS, HART, FIELDBus Foundation, GOST and KTL approved for Hazardous Locations, Gas Performance and SIL 2 ratings among others
  • Class I, Div 1, Groups A, B, C & D; Class II, Div 1, Groups F and G; Hazardous Locations
  • Class I Zone 1 Group IIC, Class II, Zone 20 & 21
  • Intrinsically safe barriers for HART and EC connections

What's in the Box

  • Magnetic wand/screwdriver
  • Allen key
  • 3 x blanking plugs
  • Quick start guide and manual CD

The Honeywell XNX is a universal transmitter for toxic, oxygen and combustible gas detection which supports the widest range of sensors on a common platform and offers a modular choice of inputs and outputs. The XNX is designed for flexible integration, simple installation, user-friendly operation and straight-forward maintenance.

There are three versions of the Honeywell XNX Universal Gas Transmitter available supporting millivolt, electrochemical cell and infrared gas detection. The IR and electrochemical cell versions require the purchase of a compatible sensor separately. The 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.

The XNX offers a variety of communication options to suit your industrial operation's unique and changing needs. HART communication comes standard on the XNX — with optional EDDL — along with optional Modbus, Foundation Fieldbus or relays. It can interface with a PLC and a host of other protocol compatible devices found in industrial applications. With the XNX, you are freed from the need to add extra controllers, junction boxes, relays, monitors and other equipment accessories. The integration of our EDDL software also enables the XNX to work with a number of third-party distributed control systems (DCS).

The XNX 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.

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


Honeywell XNX Toxic Calibration Kit
Includes accessories need to perform calibrations on toxic gas sensors (does not include calibration gas)
Honeywell XNX Combustibles Calibration Kit
Includes accessories needed to perform calibrations on combustible gas sensors (does not include calibration gas)
Honeywell Calibration Flow Adapter
Calibration flow adapter for the Honeywell XNX universal transmitter (for use with MPD sensors)
Honeywell Calibration Flow Housing
Calibration flow adapter for the Honeywell gas detectors
Honeywell S3KCAL Calibration Cap
Calibration cap for use with EC Sensors
In Stock

Mounting Bracket

Honeywell Pipe Mount Kit
Pipe mount kit for Honeywell XNX universal gas transmitters
Honeywell Ceiling Mounting Bracket
Ceiling mounting bracket for Honeywell XNX universal gas transmitters
Honeywell Duct Mounting Kit
Duct mount kit for Honeywell gas transmitters


Honeywell MPD Gas Sensor
Low-cost Infrared or Catalytic bead sensing cell for monitoring flammable industrial gases in hazardous areas
Honeywell Smart Sensor Cartridges
Electrochemical oxygen and toxic gas sensors for use with Honeywell gas transmitters
Honeywell S3K Sensor Cells
Replacement electrochemical oxygen and toxic sensor cells for Honeywell gas transmitters
In Stock
Honeywell MPD Sensor Cartridges
Replacement Infrared or Catalytic sensor cartridges for Honeywell MPD gas sensors


Please consider these optional accessories.

Honeywell Collecting Cone
The collecting cone improves detection of lighter-than-air gases such as hydrogen and methane
Honeywell Remote Gassing Kit
Enables gas to be applied remotely for performing functional response checks
Honeywell MPD Interface Adaptor
Combines with the duct mounting kit to allow MPD sensors to detect flammable gases in duct applications
Honeywell Magnetic Wand & Screwdriver
Magnetic wand & screwdriver tool for the Honeywell XNX universal transmitter
Honeywell XNX Toxic Calibration Kit HCN, Cl2, HF, NH3, HCl
Includes accessories needed to perform calibrations on toxic gas sensors (does not include calibration gas)
Honeywell Calibration Gas
Combustible & toxic gases for Honeywell calibration kits
Honeywell 301C Gas Controller
Continuous monitoring and control of up to 96 inputs/outputs
Honeywell SPXCDMAG Magnetic Wand
Tool for communicating with Sensepoint XCD transmitters for configuration, calibration, and checking system status
In Stock
Honeywell Remote Sensor Mounting Kit
ATEX/UL/cUL approved enclosure with sensor socket, 50ft of digital cable & glands, transmitter cable plug, & mounting screws


This product can be used in the following applications: