Crowcon T4 Gas Detector

Crowcon T4 Gas Detector


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Crowcon T4 Multi Gas Detector Series

Crowcon T4 Gas Detector

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Crowcon T4 Multi-Gas Detector

The popular Crowcon T4 gas detector provides reliable protection against the 4 most common gas hazards (O2COH2S and LELs).

It has a streamlined, user-friendly design that is complemented by its one-button operation, allowing easy use even when wearing gloves.

The robust housing of the T4 CH4 gas detector comprises an anti-shock rubber, and thanks to its ATEX approval can be used in the most hazardous of environments.

The Crowcon Tetra 4 multi-gas detector has a clear, backlit display that flashes green when working correctly – switching to red if attention is required. A triple alarm system (vibrating, visual and audible) will quickly draw the attention of the user when required, and an innovative TWA (time weight average) resume function ensures continuous safety as toxic gas exposure is calculated by the detector over an entire shift.

This intrinsically safe Crowcon gas detector is utilised nationwide because of its advanced technology, variety of features and user-friendly functionality.

Key Features

  • Includes a three-year warranty.
  • Extended eighteen-hour battery life.
  • One button operation.
  • Easy to use menus.
  • Robust anti-shock casing.
  • Triple audible, visual and vibrating alarm system
  • Traffic light indicators provide constant assurance.
  • TWA resume-analyse toxicity exposure throughout the shift.
  • Inverted 180 degrees backlit display.
  • Intrinsically safe for use across various environments.
  • Rating: IP67.
  • 180° display for easy viewing.



SizeW135 x H80 x D35 mm (5.3 x 3.1 x 1.4in)
Weight282g (9.9oz)
DurabilityDrop tested to 4m onto concrete
AlarmsAudible >95dB
Bright red/blue visual LEDs
Integrated vibrating alert
DisplayFront mounted, backlit. Optional 180° flip for easy viewing whilst worn
Logging130 hours of data logging; Up to 3500 events
BatteryRechargeable Li-ion
18 hour typical runtime
5.5 hour recharge
Operating temperature-20°C to +55°C (-4°F to +131°F)*
Humidity10 to 95% RH @ 40°C non-condensing
Ingress protectionIndependently tested to IP65 and IP67
ApprovalsIECEx: Ex d ia IIC T4 Gb Tamb -20°C to +55°C
ATEX: Ex II 2 G Ex d ia IIC T4 Gb Tamb -20°C to +55°C
UL: Use in hazardous locations Class 1 Div 1, groups A, B, C and D only as to intrinsic safety
INMETRO: Ex d ia IIC T4 Gb Tamb -20°C to +55°C
ComplianceEMC Directive 2014/30/EU
InterfaceUSB communications lead
AccessoriesIncluded with T4: Integrated alligator clip and tethering loop Bump/calibration plate. Available separately: Single unit cradle charger, 10 unit cradle charger, vehicle charger. Clip on filter plate for sensor protection in dusty environments I-Test automated bump and calibration station

Sensor Ranges

Oxygen (O2)0-30% vol.0.1% vol.
Flammable0-100% LEL1% LEL
Hydrogen sulphide (H2S)0-100ppm1ppm
Carbon monoxide (CO)0-1000ppm1ppm


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