Marsh Gauges
Diaphragm Series "G"
Low Pressure

bulletDial Sizes:  2 1/2", 3 1/2" and 4 1/2"
bulletFour Case Styles
bulletAccuracy:  ASME B40.1 - 2-1-2%
Marsh Instruments Low Pressure Diaphragm Gauges are universally known for their dependable performance and accuracy.  Incorporating a unique design feature, the diaphragm element allows accurate low pressure readings in a variety of applications.  Featuring a bronze diaphragm element, the gauge is capable of ASME/ANSI Grade A-1% accuracy for ranges above 30 inches of water.  Ranges are available in vacuum and pressure in inches of water, ounces per square inch and millimeters of mercury.
  Specifications:
Accuracy  For ranges 30 H20 & above: ASME Grade A = 2/1/2% (1% of range over middle half of scale, 2% elsewhere). For ranges below 30 H20: 3/1/3% (1% over middle half of scale, 3% elsewhere).
Case Sizes  2 , 3 , 4 diameter.
Case Material  Drawn steel phosphatized for rust resistance and finished with black paint.
Case Style  2 : LM = Plain case with bottom connect = Marshalltown 83K. CB = Plain case with center back connect = Marshalltown 83KC. UC = U-Clamp case with center back connect = Marshalltown 83KB. FF = Three-holed front flanged case with center back connect = Marshalltown 83KD. 3 & 4 : Plain case with bottom mount only (LM) = Marshalltown 83K.
Diaphragm & Socket   Phosphor bronze diaphragm soft-soldered to brass socket.
Movement  Brass sector and pinion with polycarbonate top & bottom plates.
Connection  1/8 & 1/4 NPT. Plug = rubber vacuum cleaner plug (2 only) = Marshalltown 82K. Hose = three feet of rubber hose (2 only) = Marshalltown 84K Gas Test Kit.
Ranges Dual Scale with kPa: 0 to 200 H20 VAC; 0 to 300 H2O, 0 to 10 PSI, 0 to 160 Oz/In2. TRIPLE SCALE: 0 to 58 Oz/In2, in H2o, and kPa. COMPOUND RANGES (consult factory).
Dial  Black markings on white background, anodized aluminum.
Pointer  Black aluminum with brass bushing.
Window  2 & 3 : twist-on Clearlok acrylic window. 4 : flat acrylic window with steel friction ring.
Restrictor   0.013 standard. No restrictor on 0 to 10 H2O range.

Standard 2 1/2" Ranges & Part Numbers:
3 1/2", 4 1/2", 83KR, 82K and 84K Gas Test Kit: 
Pressure Conversion Table:
Gauge Options:

 

                                                           

     Salt Lake City, UT

     801-487-8795  FAX 801-487-8798
     
mountaincontrolsinc@gmail.com