Marshall G22745 2.5" Diaphragm Gauge, 20 oz/in2 and 35" H2O, 1/8" LM

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2.5" Diaphragm Gauge, 20 oz/in2 and 35" H2O, 1/8" LM
Item: G22745

Marshall G22745 2.5" Diaphragm Gauge, 20 oz/in2 and 35" H2O, 1/8" LM

Marsh Diaphragm Gauges (PDF)

Products > Marshall Pressure Gauges
2.5" Diaphragm Gauge, 20 oz/in2 and 35" H2O, 1/8" LM
Item: G22745

2.5" Dial
Range: 20 oz/in2 and 35" H2O
1/8" NPT LM

Low pressure diaphragm gauges are universally known for their dependable performance and accuracy. Incorporating a unique design feature, the diaphragm element in this gauge allows accurate low pressure readings in a variety of applications. Featuring a bronze diaphragm element, the gauge is capable of ASME Grade A - 1% accuracy for ranges above 30" of water. Ranges are available in vacuum and pressure in inches of water, ounces per square inch and millimeters of mercury.

Typical applications include HVAC systems and low pressure gas burner systems. Custom dials and ranges are available.

Accuracy: For ranges 30" H2O & above: ASME Grade A = ± 2/1/2 (±1% of range across middle half of scale).
For ranges 30" below H2O: ± 3/1/3 (±1% of range across middle half of scale)
Case Sizes: 2.5", 3.5", 4.5" diameter
Case Material: Steel, black painted
Case Styles: CB: Central Back Mount, FF: Three-holed Front Flanged Mount, LM: Lower Mount, UC: U-Clamp Mount
Diaphragm & Socket: Phosphor bronze diaphragm soft-soldered to brass socket
Movement: Brass sector and pinion
Connections: 1/8" & 1/4" NPT
Dial Standard: Dual scale with kPa
Triple scale: oz/in2, H20 & kPa
Dial Color: Black markings on white
Pointer: Aluminum, black painted
Window: 2.5" & 3.5": Acrylic Twist-on clearlok 4.5": Flat acrylic window with steel friction ring
Restrictor: 0.013" standard. No restrictor on 0 to 10" H2O range

Marshall Instruments
Marshall Pressure Gauges
Rev. 9/27/2024

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