3M Gas & Fire Detection is pleased to announce that the DG-TT7-S and DM-TT6-S gas detectors with Metal Oxide Semiconductor (MOS) sensor are now SIL 2 approved.
The devices underwent stringent functional safety assessments by a third-party agency in order to receive SIL 2 approval. A SIL 2 level Functional Safety Approval is obtained when using the detector output current in the safety loop of the customer’s system.
The DG-TT7-S and DM-TT6-S are solid-state metal oxide semiconductor (MOS) gas detectors used mainly for the detection of hydrogen sulphide in arid locations having air present. The units employ a robust sensing element that requires recalibration just once every three months for optimum performance, but in some instances calibration can be extended to six-month intervals. In addition the device does not need a high gas concentration dose to react with the active sensing material.