Crowcon T4 Portable Gas Detector

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The Crowcon T4 is a portable gas detector, suitable for detecting the 4 most common gas hazards:
Carbon Monoxide (CO)
Hydrogen Sulphide (H2S)
Flammable Gases
Oxygen Depletion (O2)

The Crowcon T4 offers compliance, robustness and low cost of ownership in a simple to use solution. The T4 comes with a large single button and intuitive menu system which allows it to be operated while wearing gloves and with minimal training.

The T4 is one of Crowcon’s toughest portables, is durable by design and includes an integrated rubber boot as standard. An optional clip-on filter cover, which is easily removed and replaced, ensures sensors are protected in the dirtiest environments. The Crowcon T4 is drop tested to 4m and well protected from water ingress through IP65 and IP67 certification.


Oxygen (O2)0-30% vol0.1% vol
Oxygen (O2) Long Life0-30% vol0.1% vol
Flammable0-100% LEL1% LEL
Hydrogen sulphide (H2S)0-100ppm1 ppm
Carbon monoxide (CO)0-1000ppm1 ppm

*The new MPS sensor is a multi-gas flammable gas sensor, also suitable for Hydrogen (H2) with 5 year calibration and warranty.

Additional information


135 * 80 * 35mm


~280 g


Drop tested 4m onto concrete


Audible: 95dB, Vibrating: Integrated, Visible: Bright red and blue LED’s


Front mounted, backlit, 180° flip for easy viewing while worn


Data: 130 hours of data at 10s intervals, Events: 3500

Battery Type

Rechargeable Li-ion: Up to 18 hour runtime; up to 35 hours run time with MPSTM sensor fitted; 5.5 hour recharge


-20 to +55°C (-4°F to +131°F)

IP Rating

IP65, IP67


EMC: Directive 2014/30/EU


ATEX and UKCA: II 2 G Ex db ia IIC T4 Gb Tamb -20°C to +55°C (T4 Type 2), IECEx : Ex db ia IIC T4 Gb -20°C ≤ Ta≤ +55°C (T4 Type 2) UL USA and cUL: Use in hazardous locations Class 1 Div 1 groups A,B,C,D only as to intrinsic safety, INMETRO: Ex db ia IIC T4 Gb -20 °C ≤ Ta ≤ +55 °C, MED: Directive 2014/90/EU


Bump/calibration plate (included), Clip on dust filter plate, I-Test automated bump test and calibration station, Integrated alligator clip and tethering loop (included), Single unit cradle charger; 10 unit cradle charger; Vehicle charger

Crowcon Connect Compatible?