This is a differential pressure switch rated for a 19.2-28.8V AC/DC supply, drawing 4W. Differential pressure switches of this type monitor the pressure difference across two points in a system — commonly a filter, damper, or fan — and trigger an output signal once the differential crosses a set threshold, typically used for filter-blockage or airflow-proving alarms.

The manufacturer and exact model are not recorded against this catalog entry, and this unit is marked as discontinued, so beyond the supply voltage and power draw already confirmed here we have not sourced further specification. Supplied by Z&F Corporation — our technical sales team can help identify a current equivalent if you need a replacement.