• T4 Personal 4 Gas Monitor


T4 integrates innovative safety features and an intuitive, rugged design to provide advanced protection for those working in harsh environments.

  • Carbon monoxide
  • Hydrogen sulphide
  • Oxygen
  • Flammable gases

Product Details

This portable multigas detector, which is exceptionally easy to use and service, protects against the four most prevalent gas hazards: carbon monoxide (CO), hydrogen sulphide (H2S), flammable gases and oxygen (O2) depletion.


TWA resume function – Unique to T4, this innovative feature 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.

18 hour battery life – Safely work multiple or longer shifts between charges, covered by the 18 hour battery life.

Backlit display – Large, clear display with backlight and option to flip the screen 180° for easy viewing whilst worn.

Rugged design – With a thick anti-shock rubber casing and drop tested to 4 metres on concrete, T4 provides dependable operation under the most demanding use.

Water & dust resistant to IP65 & IP67 – Provides protection in the harshest environments.

Dedicated sensors – One sensor for every gas ensures effective, fast and reliable detection.

Positive safety indicator – A simple ‘traffic light’ status indicator which, at a glance, provides visual assurance of operational and compliance status to both users and supervisors.

Green light – Working safely

Red light – Attention required

Intrinsically safe – ATEX approved and UL Class 1 Div 1 for safe operation in a wide range of hazardous environments.

Multiple alarms – Audible 95dB alarm, bright red/blue LED’s and vibrating alerts provide effective warning to gas hazards.

Easy operation – Large single button and intuitive menu system minimise training and allow easy operation whilst wearing gloves.

Weight282g (9.9oz)
AlarmsAudible: 95dB
Vibrating: Integrated
Visible: Bright red & blue LED’s
DisplayFront mounted, backlit, 180° flip for easy viewing while worn
LoggingData: 130 hours of data at 10s intervals
Events: 3,500
BatteryRechargeable Li-ion: Up to 18 hour runtime; 5.5 hour recharge
EnvironmentOperating temp: -20 to +55°C (-4°F to +131°F)*
Humidity: 10-95% RH @ 40°C non-condensing
Ingress protection: Independently tested to IP65 and IP67
ComplianceEMC: Directive 2014/30/EU
ApprovalsATEX: Ex db ia IIC T4 Gb -20°C ≤ Ta ≤ +55°C
IECEx: 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,D only as to intrinsic safety
INMETRO: Ex db ia IICT 4Gb -20°C ≤ Ta ≤ +55°C
MED: Directive 2014/90/EU
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 dust filter plate
I-Test automated bump test and calibration station
*Toxic and oxygen sensors are not rated for continuous operation above 50°C (122°F)
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