Please email / call for availability
Get a quote
Enter your details and we will get back to you as soon as possible.

Product Features
  • Flammable and toxic gas detection and oxygen monitoring
  • Choice of M20 or ½”NPT connection
  • IP65 or IP66 rating
Delivery options

At Cadmus Products we aim to deliver orders efficiently and at highly competitive rates. 

  • We can ship consignments of all shapes and sizes and hazardous content across the UK and worldwide. Most of our orders are sent via DHL, however sometimes we may use other couriers.
  • If you are purchasing a laboratory product online you can find out the price of shipping checkout. If you are obtaining a quote for a product, then we will email you
    with our best shipping prices along with your quote.
  • Please see our delivery page for full information
The Crowcon Xgard Bright is a versatile platform offering flammable and toxic gas detection and oxygen monitoring, while providing ease of operation and reduced installation costs. Providing analogue 4-20mA and RS-485 Modbus signals as standard, the Xgard Bright comes with an Alarm and Fault relay as standard as well as optional HART communications.

Lowering the cost of installation, the 4-wire addressable implementation drastically reduces cabling requirements. The large OLED display allows users to easily work with Xgard Bright during install, calibration and routine maintenance without the need to open the housing.

The Xgard Bright is now available with MPS (Molecular Property Spectometer™) technology.

A wide range of new gases and sensor types are now available and have been added to the configurator. The Crowcon flameproof (Exd) detector is housed within a high-grade aluminium alloy case. Certifications include gas and dust approvals for ATEX and IECEX with UL gas certification in progress.

The Xgard Bright is now available with MPS (Molecular Property Spectrometer™) technology
  • Sensor Poisoning is solved
  • Calibration is over
  • TrueLEL™ multi-gas accuracy
  • Hydrogen ready

  • Flammable and toxic gas detection and oxygen monitoring – Reducing training requirements across sites
  • Choice of M20 or ½”NPT connection – Supports multiple site requirements
  • Low power requirement (~3W max) – Reducing site-wide power consumption
  • IP65 or IP66 rating (with weatherproof cap) – Allows use in areas subject to regular wash downs or in exposed environments
Ease of installation and operation:
  • Addressable – Drastically reduces the amount of cabling needed for multi-point installations
  • Local display – Delivers gas level indication, status and supports maintenance routines
  • Non-intrusive calibration – Removes the need to open the cover for calibration
  • Plug in type terminal blocks: Making wiring quick and easy reducing installation costs
  • Configuration via magnetic key – Reducing the amount of time operators spend in a hazardous area

Building on over 50 years of gas expertise, Crowcon is pioneering advanced molecular property spectrometer (MPS™) sensor technology that detects and accurately identifies 15 different flammable gases in one device
Size 156 x 166 x 109mm (6.1 x 6.5 x 4.3inch)
Cable Entry 2x M20 (stopping plug fitted to left-side entry)
Power 10-30Vdc. 3W max
Electrical Output 4-20mA current sink or source
RS-485 Modbus RTU
HART (Optional)
Weight Aluminium alloy 1kg (2.2lbs)
Enclosure Material ADC 12 aluminium alloy
Relay Alarm 1, Alarm 2, Fault

SPST contacts rated 1A 30Vdc

Sounder Out 24Vdc (nominally), 250mA maximum load
Operating Temperature -40°C to +70°C (-40°F to 158°F)

Note: sensor operating temperatures vary widely.

Refer to the sensor module datasheet or contact

Crowcon for specific sensor data.

Humidity 0 to 95% RH, non-condensing
Repeatability +/- 2% FSD
Zero drift +/- 2% FSD per year maximum
Ingress protection IP65 (IP66 with weatherproof cap)
Approvals ATEX and IECExEx II 2 G Ex db IIC T6 Gb

Ex tb IIIC T80ᶜ Db

II 2 G Ex db IIC T6 Gb

II 2 D Ex tb IIIC T80ᶜ Db

Certificate numbers:

TUV 16 ATEX 7908 X

IECEx TUR16.0035 X

EMC Compliance EN50270: 2015
Standards EN60079-0 :2012 + A11:2013
EN60079-1 :2014
IEC60079-0 :2011 Edition 6
IEC60079-1 :2014 Edition 7
Zones Certified for use in Zone 1 and Zone 2 areas

Gases and Ranges

Gas Units Max
Alarm 1
Alarm 2
range °C 
MPS Flam %LEL 100 100 20 40 -40 to +75
Oxygen (O2) %Vol 30 25 19 (falling) 17 (falling) -20 to +50
Carbon Monoxide (CO) PPM 1000 250 30 200 -30 to +50
Hydrogen Sulphide (H2S) PPM 100/200 25 5 10  -30 to +50
Hydrogen (H2) %LEL 100 100 20 40 -40 to +75
Methane (CH4) %LEL 100 100 20 40 -40 to +75
Pentane (C5H12) %LEL 100 100 20 40 -40 to +75
LPG %LEL 100 100 20 40 -40 to +75
Carbon Dioxide (CO2) %VOL 0-5% 0-5% 0-2% 0-3% -20 to +50
PID (VOC) – Safe Area PPM 1000 1000 30 50 -20 to +50
Infra Red Methane (CH4) %LEL 100 100 20 40 -40 to +75
Infra Red Propane (C3H8) %LEL 100 100 20 40 -40 to +75
Ammonia (NH3) – Safe Area PPM 100 50 25 25 -20 to +40
Chlorine (CL2) – Safe Area PPM 10 5 1 3 -20 to +40
Ozone (O3) – Safe Area PPM 1 1 0.1 0.2 -20 to +40
Sulphur Dioxide (SO2) – Safe Area PPM 100 10 1 1 -30 to +50
Infra Red Butane (C4H10) %LEL 100 100 20 40 -40 to +75
Infra Red Pentane (C5H12) %LEL 100 100 20 40 -40 to +75
Infra Red LPG %LEL 100 100 20 40 -20 to +55
Write Your Own Review
You're reviewing:Crowcon Xgard Bright
Your Rating