acura DP gauges provide reliable indication of blocked filters to filter operators and maintenance personnel. Differential pressure measurement is a reliable way to measure filter life. Changing filters on time can reduce your consumable spend and eliminate the risk of filter failure. DP gauges are supplied fully assembled and can be combined with an optional reed switch to send an external electrical signal. A user-friendly dial provides easy to read visual indication. Drag indicator option can be used to control maximum differential pressure.