For gas monitoring with specified SIL requirements, the stationary Polyxeta2 gas detector from MSR-Electronic with exchangeable sensor is used. The microprocessor-based gas sensor with output signal as well as alarm and fault relays (all SIL2 certified) monitors the ambient air for combustible gases and vapours by means of a catalytic pellistor sensor element. The 4…20 mA/RS-485 Modbus output signal makes the sensor suitable for connection to the Polygard2 gas controller series from MSR-Electronic as well as to other MSR controllers or automation devices. As an option, the sensor is also available with LCD and relay output. Individual customer configuration, e.g. for alarm thresholds and relay assignments, is possible as well.
For Polyxeta2 sensors without LCD, calibration is performed via the handy calibration device STL06-PGX2 or the PC software PCE06-PGX2. Sensors with LCD have an integrated calibration routine that is started from the outside with a permanent magnet without opening the housing. For these sensors, the background lighting changes from green to red in case of alarm
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