Ashcroft 1490 Low Pressure Diaphragm Gauge

Part Number:
25 1490A 02L 30INW
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Ashcroft 1490 Low Pressure Diaphragm Gauge, dry case, 2-1/2" dial, 0-30 "H2O pressure range, copper alloy (brass) wetted parts, 1/4" NPT lower mount, polysulfone case

Front View of Ashcroft 25 1490A 02L 30IN H20
photo provided by Ashcroft
represents sample pressure range
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The Ashcroft 1490 low pressure diaphragm gauge is designed to measure pressures from 10" H2O to 15 psig, both positive and negative, using a very sensitive diaphragm capsule. The gauge is specifically designed for use on non-corrosive gases. The polysufone case is suitable for intermittent or continuous service on natural gas provided a .013" throttle plug is installed in the socket. Typical applications include vacuum pumps, gas leak detectors, air compressors, air filters, gas burners, vacuum ovens, suction regulators and respirators.

  • Diaphragm capsule design for low pressures
  • Glass-filled polysulfone case
  • Beryllium copper diaphragm and brass socket
  • ASME B 40.1 Grade A, +/-2-1-2% of span
  • 2-1/2" and 3-1/2" dial sizes
  • 0-10" H20 vacuum or pressure to 0-15 psig



Brand Ashcroft
Case Style dry case
Dial Size 2-1/2"
Pressure Range 0-30 "H2O pressure
Process Connection 1/4" NPT lower mount
Wetted Materials copper alloy (brass)



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