Crowcon T4




The Crowcon T4 is a 2-4 gas personal monitor for detecting H2S, O2, CO, and flammable gases in the most demanding environments. T4 boasts a wide range of safety features including +ve Safety visual assurance of unit compliance; visible, vibrate, and 95dB audible alarms; easy and intuitive single button operation; IP65 and IP67 ingress protection; 18 hour rechargeable battery for working multiple/longer shifts; and comprehensive data and event logging.

Includes: quick start guide, bump/calibration cap, calibration certificate and declaration of conformity.


Charger Sold Separately.


Crowcon T4 Manual

Crowcon T4 brochure

Gas Range Resolution
Carbon monoxide (CO)  0-1000ppm  1ppm
Flammable  0-100% LEL  1% LEL
Hydrogen sulphide (H2S)  0-100ppm  1ppm
Oxygen (O2)  0-30% vol.  0.1% vol.

Crowcon T4

T4 is Crowcon’s personal protection solution for detecting the four most common gas hazards:

  • carbon monoxide
  • hydrogen sulphide
  • flammable gases 
  • oxygen depletion

Offering you compliance, robustness and low cost of ownership in a simple to use solution. The large single button and intuitive menu system allows T4 to be operated wearing gloves with minimal training.

Crowcon’s toughest portable yet, T4 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. Drop tested to 4m and well protected from water ingress through IP65 and IP67 certification, T4 allows uninterrupted working in the most demanding environments.

Now with improved detection of pentane, hexane and other long chain hydrocarbons.

Additional information

Weight .5 lbs
Dimensions 5.3 × 3.1 × 1.4 in

4-Gas (H2S, O2, CO, CH4 %LEL), 3 Gas ( O2, CO, CH4 %LEL), 3-Gas (H2S, O2, CH4 %LEL), 2-Gas (O2, CH4 %LEL), 2-Gas (O2, CO), 4-Gas (H2S, O2, CO (H2 Resistant), CH4 %LEL), 3-Gas (O2, CO (H2 Resistant), CH4 %LEL)