Filter Minder® Single Position Switch Indicator Model No. 175578 (1/8" pipe thread) 176578 (3/8" straight thread) 177578 (M-10 thread) How Does It Work? A combination single position indicator and switch. The window turns red when the maximum recommended air filter restriction has been reached and a signal is sent to the filter warning light on the dash or to the engine computer to record as a diagnostics fault. The warning light locks on until the indicator is reset. Specifications Operating Temperature: -40 to +250°F (-40 to +121°C) Switch activation point: 8" H20 (2kPa) minimum to 40" H20 (10kPa) maximum Accuracy: ±10% at switch activation Material: Polycarbonate housing Normally open or closed switches with precious metal contacts Molded in sealed connector Dimensions Length: 55 mm Diameter: 50.3 mm (with connector: 64 mm)   HOME WHAT WE DO HISTORY CAPABILITIES PRODUCTS CONTACT   Engineered Products Co. 2940 Airport Blvd. Waterloo, IA 50703 Ph: (319) 234-0231 Fax: (319) 234-8922 info@filterminder.com