Faria Beede Instruments Black SS 2" Water Temperature Gauge 100-250F Chesapeake. 0625" (53mm) A temperature gauge operates by sending a low amperage current through the gauges's meter to ground via a sending unit with variable resistance. The resistance of the sending units increase or decrease with the changes in pressure temperature etc... As the sender's resistance varies the amount of current allowed to flow through it to ground changes and the meter deflects showing the temperature. Available for MG systems J1939 CAN Bus or J1939 Stand-Alone systems and mechanical types. Benefits: Standard (100-250 F) Metric (40-120 C) Dual Scale With or without Warning Lights Specifications for Faria Beede Instruments Chesapeake Black SS 2" Water Temperature Gauge 100-250F: Manufacturer: Faria Beede Instruments Color: Black Features of Faria Beede Instruments Chesapeake Black SS 2" Water Temperature Gauge 100-250F Perimeter-lighted black dial Stylish blue and white graphics Polished Stainless Steel bezel Domed glass lens Package Contents: Faria Beede Instruments Chesapeake Black SS 2" Water Temperature Gauge 100-250F Faria Beede Instruments 13704: Black SS 2" Water Temperature Gauge 100-250F Chesapeake