The PEL 2500-SV filter protector is designed to monitor filters in systems that handle air and other non-flammable gases. The pressure measurement is temperature compensated depending on the ambient temperature. The device includes three luminous indicators that Assenyalen the status of the filter. The indicator light limits can be changed using the ML-SER line. The voltage levels are controlled according to the indicator lights. It is possible to select the output signal so that it follows differential linear pressure or linear flux (volume). The zero point of the transmitter is kept exact using the regular automatic zero position, eliminating the possible deviation of the zero point. Normally it does not heat the recalibration. The influence of process alterations (e.g. turbulence) can be determined by selecting an appropriate temperature constant (2 s or 8 s).