Migration: no migration; zero leakage from high to low port. First marking on the scale: 15 percent of FSD. Sensing element: diaphragm. Wetted parts: diaphragm, body material, SS spring, ceramic magnet. Case material: engineered polymer. Dial size: 2.5 (square), 4.5" (round). Mounting: direct, front flange, 2" pipe and surface mounting. Maximum working pressure: 1500 psi / 100 Bar. Maximum process temperature: 200 degree F. Seals: Buna-N. Lens: Plexiglass (acrylic). Connection: 1/4" NPT(F) Std. Porting: In-line. Over range protection: Up to the maximum from high and low side. Protecting for gauge and switch: NEMA-4/IP65. Applications includes: Filter monitoring, pump performance, level measurement, Flow, flow direction, pressure monitoring, Flow rate, strainer monitoring, condition monitoring of heating/cooling system, Air filter and collector/bag filter monitoring, collector/bag filter monitoring, blower performance.