Crowcon T4 Personal Four-Gas Monitor Overview


Crowcon T4 Multi-gas DetectorThe T4 Personal Four-Gas Monitor by Crowcon provides complete user confidence and maintains full industry compliance through its clever integration of innovative safety features, rugged design, and intuitive usability ensuring fast simple operation even in the toughest of working conditions.

This easy-to-use portable multi-gas detector provides continuous wearer protection against the four most common gas hazards:

  • Flammable Gases (CH4)
  • Oxygen (O2) Depletion
  • Hydrogen Sulphide (H2S)
  • Carbon Monoxide (CO)


“The T4 provides complete confidence to customers who require continuous and reliable protection against the four most common gas hazards”



TWA Resume Function
Unique to this model of gas detector, the resume function ensures toxic gas exposure is calculated accurately over an entire shift, even if the T4 is switched off during a break, or whilst travelling between different sites.

18-hour Battery Life
Safely work longer or multiple shifts between charges

Backlit Display
Large backlit display with 180-degree flip option for easy viewing whilst being worn

Rugged Design
Water & Dust resistant to IP65 & IP67, with a thick anti-shock rubber casing (drop tested 4m onto concrete), the T4 gas detector will continue to operate under the most demanding circumstances.

Dedicated Sensors
Individual sensors for each gas provides more reliable and effective detection when compared to other gas detectors

Positive Safety Indicators
An easy-to-follow (green working safely, red requires attention) traffic light display, which quickly provides visual assurance of operational status and compliance for both users and supervisors.

Intrinsically Safe
ATEX Approved and UL Class 1 Div 1 for safe operation within a wide range of hazardous environments.

Multiple Alarms
95dB audible alarm, bright red/blue LED’s and vibrating alerts provide effective warning to the user and any colleagues within close range.

Easy operation
Large single button operation and intuitive menu system reduces training times and ensures safe use even whilst wearing gloves.

T4 Gas monitor Application


The Crowcon T4 Gas monitor is ideally suited for utility companies looking for a large fleet of devices with a data capacity that can guarantee complete compliance for their workforce.


The most common prevalent gasses are quickly detected by the ruggedly designed T4; its durable, shock-proof casing and its range of peripherals (such as the ten-way charger), makes this gas detector a popular choice.

Steel Plants

The T4 gas detector can be supplied with a hydrogen immune CO sensor which is a perfect fit for steel plant application where parts of the process involve Hydrogen, and a regular CO sensor would be unsuitable.

T4 Accessories & Peripherals

Calibration-plateBump/Calibration plate – T4-CAL-CAP
For applying test gas to T4.

T4 external-filter-plateExternal filter plate – T4-EXT-F
Clip-on filter for additional protection in dusty environments. Protects the sensors from contamination.

i-test-for-t4I-Test – IT-T4-11Z-ZB-X
Easy automated bump testing and calibration solution.

t4-cradle-chargerCradle charger – T4-CRD
Docking station for easy charging. Includes multi-region power supply.

t4-10-way-charger10-way charger – T4-TWC
Charge and store up to 10 units. Requires only a single power outlet. *Not available for UL certified products

usb-lead-for-t4-gas-detectorT4 USB communications cable – CH0103
For PC connection to T4.


You can order your T4 gas detector online by clicking here,
or for further information call our team today at 0845 3300 447

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