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T4 Multi-Gas Detector


> Gases - Oxygen (O2), Combustibles (LEL IR), Hydrogen Sulphide (H2S) and Carbon Monoxide (CO)

> Data Storage - 130 hours of data logging; Up to 3500 events

> Product Rating - IP65 & IP67 rating 

> Battery - Run Time (diffusion): 18 hour runtime for 4 sensors with the pump running. 5.5 hours recharge time

> Advanced Features - TWA Resume ensures toxic gas exposure is calculated accurately over an entire shift

Excl. VAT: £305.00 Incl. VAT: £366.00

Product Description


The Crowcon T4 portable multigas detector provides effective protection against 4 common gas hazards: carbon monoxide, hydrogen sulphide, flammable gases and oxygen depletion. Now with improved detection of pentane, hexane and other long chain hydrocarbons.

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

T4 contains a wide range of powerful features to make everyday use easier and safer.

TWA Resume

Unique to T4, the TWA Resume function ensures toxic gas exposure is calculated accurately over an entire shift, even if T4 is switched off for a break or during travel to another site.

When most portable detectors are turned off, the algorithm that assesses TWA exposure assumes that it’s the end of the shift. When turned on again, these detectors act as if it is a new work shift, ignoring all previous measurements. The TWA Resume function, however, provides the option to include previous measurements from within the correct time frame.


With a battery life of 18 hours, T4 allows multiple or longer shifts to be worked between recharging

Positive Safety

Crowcon's +ve visual 'traffic light' indication, provides constant visual assurance that T4 is operating soundly and conforms to site bump test & calibration policy. The bright green and red Positive Safety LEDs are visible to all and offer a quick, simple and comprehensive indication of monitor status to both the user and others around them.


T4 includes a 2 year warranty as standard. 3 year warranty is available (T4-CRD) at an additional cost of £40.


Quick start guide, bump/calibration cap, calibration certificate and declaration of conformity. Charger (T4-CRD) sold separately.


T4 is complemented by a range of accessories including:

  • Multiple charging options
  • Portables Pro 2.0 software for accessing advanced T4 features and data logs
  • Clip on dust filter plates for extra sensor protection in dirtier environments 
  • I-Test which makes easy work of calibrating, bump testing and managing larger fleets of T4s

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