PEL 2500-SV filter guard is designed for filter monitoring in systems that handle air and other non-flammable gases. The pressure measurement is temperature compensated according to the ambient temperature.

The device has three indicator lights that indicate the filter status. The indicator light limits can be changed with the ML-SER. The potential free outputs are controlled according to the indicator lights. Output signal can be selected to be either differential pressure linear or flow (volume) linear. The transmitter zero point is kept accurate by using the regular automatic zeroing, eliminating the possible zero point drifting. No re-calibration is normally needed.

The influence of process disturbances (e.g. turbulence) can be damped by selecting a suitable time constant (2 s or 8 s).