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Crowcon Tetra 4 Personal Gas Detector

Crowcon tetra 4
Crowcon tetra 4
Crowcon T4

The Tetra 4 is Crowcon's personal protection solution for alerting against the four most prevalent gas hazards including oxygen depletion, carbon monoxide, hydrogen sulphide and flammable gases.

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

As well as the simple one button operation and easy to use menus, the T4 is packed with other innovative features to make its use simpler and the wearer safer. 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.

TWA Resume
TWA Resume ensures time weighted average (TWA) toxic gas exposure is calculated accurately over an entire work shift. The red line on the graph shows workers with other detectors risking overexposure to hydrogen sulphide (H2S) by switching their detector off for a lunch break. Only T4 provides the option to include previous measurements in the calculation when you switch your detector back on again and so prevent you exceeding your exposure limit. Because of TWA Resume (green line), T4 alarms at 14:00 when their 8 hour TWA reaches 5pm.


  • Zone 1 ATEX certified
  • 3 year warranty
  • Lightweight at only 282g
  • 18 hours operation time
  • Li-ion battery
  • 5.5 hours recharge time
  • IP65/67 rated
  • 1 button operation
  • TWA Resume function
  • Positive safety indicators
  • 4 Gas - FLAM / O2 / H2S / CO

    LIST PRICE £477.00

  • Code CA.T4FHOC
    Item Crowcon Tetra 4 Personal Gas Detector
    Each £380.00