Different sensor versions will suit even the most demanding industrial applications.
The DrägerSensor Ex PR M (PR = poison resistant) contains pellistors, which in the presence of catalytic poisons have a longer lifetime than conventional sensors.
The DrägerSensor Ex HT M contains also PR-pellistors, but additionally is approved to be used at temperatures up to 150 °C.
The DrägerSensor Ex LC M contains PR-pellistors, which by their special encapsulation and electronic amplification are suitable to monitor very low gas concentrations. The measuring range is 0...10% LEL.