Xgard Bright fixed toxic gas sensor

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Model: Xgrad Bright
Manufacturer: Crowcon 
Status: Stocking
Guarantee: 12 months
Price: Contact

The Xgard Bright Crowcon stationary toxic gas sensor is a versatile platform that provides hazardous and flammable oxygen detection and monitoring, while providing ease of operation and reduced installation costs.

Providing the same Modbus 4-20mA and RS-485 signals as standard, the Xgard Bright comes with Alarm and Fault relays as standard as well as optional HART communication.

Reducing installation costs, the implementation of 4-wire addressing greatly reduces cabling requirements. The large OLED display allows users to easily work with Xgard Bright during installation, calibration and routine maintenance without having to open the case.


I. Specification Xgard Bright fixed toxic gas sensor

Xgard Bright fixed toxic gas sensor


  • This flame retardant (Exd) toxic gas detector is housed in a premium aluminum alloy housing. Certifications including gas and dust approvals for ATEX and IECEX with UL gas certification in progress.


  • Xgard Bright Crowcon stationary toxic gas sensor monitors flammable and toxic oxygen and toxic gases – Reduces training requirements on systems.
  • Choice of M20 or NPT connection – Supports multiple system requirements
  • Low Power Requirements (up to 3W) – Reduces system-wide energy consumption
  • IP65 or IP66 rated (with weatherproof cover) – Allows use in areas subject to frequent washing or exposure.

Easy to install and operate:

  • Addressing – Dramatically reduces the amount of cabling required for multisite installations
  • Local Display – Provides gas level indication, status and maintenance routine support
  • Non-Intrusive Calibration – with Xgard Bright Crowcon fixed toxic gas sensor eliminating the need to open the lid for calibration
  • Plug in type terminal blocks: Makes wiring quick and easy to reduce installation costs
  • Configuration via magnetic lock – Reduces the amount of time the operator spends in the hazardous area.

***See more of GMGA’s fixed gas detectors – Crowcon Vietnam at: https://gmga.vn/en/danh-muc/analytical-equipment/gas-analysis-equipment/fixed-gas-detector-and-analyzer/

II. Specifications of Xgard Bright flame retardant toxic gas detector (Exd)

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

Gas And Range


Units Max Standard Alarm 1 Alarm 2 Temp
Range Range level level

range °C 

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


%LEL 100 100 20 40 -40 to +75
Carbon Dioxide (CO2) %VOL 0-5% 0-5% 0-2% 0-3%

-20 to +50

III. Video

***See more videos of Crowcon fixed toxic gas sensors at: Gmga Measuring Youtube.


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