Marsh Low Pressure Diaphragm Gauge, Series G, 0 to 30" Water, Steel Case, Brass Internals, Acrylic Lens, 1/4" MNPT Bottom Connection, 2-1/2" Dial, Accuracy +/-2/1/2% (+/-1% of range across middle half of scale)

Marsh Instruments 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.