Two switching outputsSignal suppression during the cold start phase and for short-term pressure peaksVisual / electrical display of status and error messagesSelf-monitoringReset functionLED illuminated halo visible from every angleM12 plug connectionThe back pressure sensor VSA 24 is a pressure switched controlled by microprocessors with two switching outputs for advance warning (filter contamination high!) and shutdown (maximum contamination reached!). Four green LEDS installed annularly in the transparent top of the device signalise the activation of the gauge by blinking immediately after applying voltage. The electronic pressure transmitter continuously measures the dynamic pressure in the return filter.