Crowcon Xgard Bright Fixed Gas Detector

Code: Xgard Bright
  • Flammable, toxic gas detection and oxygen monitoring
  • Catalytic bead, Infrared, Electrochemical & PID sensor choice
  • Zone 1 and Zone 2 areas

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The Xgard Bright is a versatile platform offering flammable, 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, 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 quickly work with Xgard Bright during install, calibration and routine maintenance without the need to open the housing or needing a hot-work permit.

Xgard Bright is ATEX and IECEx Ex II 2G db IIC T6 Gb flameproof certified for use in Zone 1 or 2 hazardous gas areas and Ex II 2D tb IIIC T80°C Db approved for use in Zone 21 or 22 hazardous dust areas. A safe area version is available.

Suitable for use with a range of cable glands with two M20 (stopping plug fitted to the left-side entry) or 1/2 NPT insert. The housing is durable Aluminium alloy.


  • 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 exposed environments
  • Outputs; 4-20mA current sink or source. RS-485 Modbus RTU

Ease of installation and operation

  • Addressable – using RS-485 Modbus. Reduces the amount of cabling needed for multi-point installations
  • Illuminated organic light-emitting diode local display shows gas readings and status. A high contrast ratio allows use in low light conditions
  • Non-intrusive calibration – No need to open the cover
  • Plug-in type terminal blocks, making wiring quick & easy
  • Testing and Configuration via a magnetic key. Limits time spent in a hazardous area
  • Approvals ATEX/ IECEx
  • EMC Compliance EN50270: 2015
  • Size 156 x 166 x 109mm (6.1 x 6.5 x 4.3inch)
  • Weight 1kg (2.2lbs)

Gases and Ranges

Alarm 1
Alarm 2
range °C 
Oxygen (O2)%Vol302519 (falling)17 (falling)-20 to +50
Carbon Monoxide (CO)PPM100025030200-30 to +50
Hydrogen Sulphide (H2S)PPM100/20025510 -30 to +50
Hydrogen (H2)%LEL1001002040-40 to +75
Methane (CH4)%LEL1001002040-40 to +75
Pentane (C5H12)%LEL1001002040-40 to +75
LPG%LEL1001002040-40 to +75
Carbon Dioxide (CO2)%VOL0-5%0-5%0-2%0-3%-20 to +50
PID (VOC) – Safe AreaPPM100010003050-20 to +50
InfraRed Methane (CH4)%LEL1001002040-40 to +75
InfraRed Propane (C3H8)%LEL1001002040-40 to +75
Ammonia (NH3) – Safe AreaPPM100/1000502525-20 to +40
Chlorine (CL2) – Safe AreaPPM10513-20 to +40
Ozone (O3) – Safe AreaPPM110.10.2-20 to +40
Sulphur Dioxide (SO2) – Safe AreaPPM1001011-30 to +50
InfraRed Butane (C4H10)%LEL1001002040-40 to +75
Infra Red Pentane (C5H12)%LEL1001002040-40 to +75
InfraRed LPG%LEL1001002040-20 to +55

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Title Size
Xgard-Bright-Data-Sheet 190 KB
Xsafe-Bright-Installation-Operation-Manual-English-Issue-4 880 KB
Xgard-Bright-Data-Sheet_es_ES 1 MB
Xgard-Bright-Data-Sheet_nl_NL 1 MB
Xgard-Bright-Data-Sheet_fr_FR 1 MB
Xgard-Bright-Data-Sheet_de_DE 1 MB
Xgard-Bright-Data-Sheet_pt_BR 1 MB

Additional information

Weight0.09 kg



Sensor Modules

S015100/S XGB Spare Sensor Module Methane 0-100% lel CH4 (pellistor)
S015101/S XGB Spare Sensor Module Oxygen 0-25% vol O2
S015107/S XGB Spare Sensor Module Hydrogen Sulphide 0-10ppm H2S
S015102/S XGB Spare Sensor Module Hydrogen Sulphide 0-25ppm H2S
S015103/S XGB Spare Sensor Module Hydrogen Sulphide 0-50ppm H2S
S015104/S XGB Spare Sensor Module Hydrogen Sulphide 0-100ppm H2S
S015105/S XGB Spare Sensor Module Hydrogen Sulphide 0-200ppm H2S
S015109/S XGB Spare Sensor Module Carbon Monoxide 0-50ppm CO
S015110/S XGB Spare Sensor Module Carbon Monoxide 0-100ppm CO
S015111/S XGB Spare Sensor Module Carbon Monoxide 0-200ppm CO
S015112/S XGB Spare Sensor Module Carbon Monoxide 0-250ppm CO
S015113/S XGB Spare Sensor Module Carbon Monoxide 0-500ppm CO
S015114/S XGB Spare Sensor Module Carbon Monoxide 0-1000ppm CO
S015115/S XGB Spare Sensor Module Carbon Monoxide 0-2000ppm CO
S015120/S XGB Spare Sensor Module LPG 0-100% lel (pellistor)
S015121/S XGB Spare Sensor Module Hydrogen 0-100% lel H2 (pellistor)
S015130/S XGB Spare Sensor Module Pentane 0-100% lel C5H12 (pellistor)


C01647 Xgard Bright Spare/Replacement M4 Earth Stud Assembly
M04885 Xgard Bright Spare Sensor Seal
M03871 Xgard Bright Threaded Hex Spacer 15mm (M4)
M03870 Xgard Bright Threaded Hex Spacer 10mm (M4)
M03760 Xgard Bright Spare M4 x 8 Posi Pan Head Screw (Customer may require 7)
M03810 Xgard Bright M3x6 Grub Screw (Customer may require 2)
M02125 Xgard Bright Spare M20 to 1/2″ NPT Adapter
C03756 Xgard Bright Cro-Mag
MIS99033 Xgard Bright Allen Key

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