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 (H2 S), flammable gases and oxygen (O2 ) depletion.
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 (H2 S) 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 5ppm.
The external clip-on filter plate for use with Crowcon T4 portable multigas detectors in dusty environments. The filter plate will protect the sensors, making it easier to maintain T4. It is suitable for use in a hazardous area. It has been designed to operate with the charging accessories and does not need to be removed when inserting T4 into the desktop charger, the 10-way charger or the T4 vehicle charger.
The filter plate should be replaced if the filters are damaged by substances that could affect the flow of gas to the sensors e.g. paints, grease or oils.