MSR ELECTRONIC PolyGard 2 MC2 - Sensor Element; A: Catalytic Sensor Element (Pellistor) for Combustible Gases

User Manual PolyGard
®
2 Sensors 2023-11 Page 26 | 40
9.4 Sensor Element
A: Catalytic Sensor Element (Pellistor) for Combustible Gases
SENSOR ELEMENT
Gas type and measuring range
See datasheet DB_MC2/SC2_Ex
Measuring principle
Pellistor (catalytic bead principle)
Temperature range
-30 °C to +60 °C (-22 °F to 140 °F)
Humidity range
0–95 % RH not condensing
Pressure range
90–110 kPa
Storage temperature range
1
0 °C to +20 °C (32 °F to 68 °F)
Storage time
2
Ca. 6 months
Service life
3
in air
> 5 years
Calibration interval
4
6 months
Poisoning
Pellistors can be poisoned by silicone-containing substances or other catalyst
poisons up to complete loss of sensitivity.
1
A deviating storage temperature can have a negative effect on sensitivity and service life.
2
If stocked for a longer period, we recommend checking the zero point and recalibrating if necessary.
3
Expected service life under normal ambient conditions.
4
Manufacturer-recommended calibration intervals for normal environmental conditions