Duplex Pressure Gauges have double pointers and double connections. Pressure from two lines can be measured on a single pressure gauge. One black pointer indicates pressure of one line and red pointer indicates pressure of other line. The Duplex gauge can be glycerin filled for optimum use. Specifications of Duplex Pressure Gauges: 100mm (4") Dial Size Bottom Direct Mount, Bottom Panel Mount, Bottom Surface Mount SS304 Case and Ring IP654 SS316/Brass Working Parts Double Pointer: Black & Red 1/4" or 3/8" or ½” bsp/npt x 2 ports Dry or Liquid Filled (Glycerin or Silicon) Accuracy ±1% F.S.D.
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