Faria Beede Instruments Euro Black Oil Pressure Gauge - 80 PSI. 0625" (53mm) A pressure 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 change in pressure. Benefits: Anti-scratch glass lens Plastic Cases for corrosion resistance and long life 12 VDC negative ground Can be adapted for 24 VDC systems Available in standard or Metric values Specifications for Faria Beede Instruments Euro Black Oil Pressure Gauge: Manufacturer: Faria Beede Instruments Color: Black Features of Faria Beede Instruments Euro Black Oil Pressure Gauge Perimeter-lighted black dial Stylish blue and white graphics Flat glass lens Please confirm part will fit before ordering Package Contents: Faria Beede Instruments Euro Black Oil Pressure Gauge Faria Beede Instruments 12803: Euro Black Oil Pressure Gauge - 80 PSI