Tank level indicators are as versatile as all other ITT BARTON differential pressure instruments. Constructed to be very rugged and durable in harsh environments. These DP Level measuring instruments use sensors at the ends of the capillary tubes to remotely sense the pressure, and transmit that pressure via the liquid fill capillary to the differential pressure instrument. There are many different configurations, ranges, materials, connections, to choose from. Your specifications are welcome. Widely used throughout the US Navy and Commercial Industry for tank level measuring. Units with switches can be set to actuate the micro switch between 5% and 95% of full scale.