Images are representations only.

1490 Low Pressure Diaphragm Gauge

Brand: Ashcroft Inc
The Ashcroft Type 1490 low pressure diaphragm gauge is designed to measure pressure from 10 in. H₂O to 15 psi, both positive and negative pressures.

This gauge uses a very sensitive diaphragm capsule to measure low pressure and vacuum.

The gauge is specifically designed for use whenever the pressure medium is a gas that is not corrosive to beryllium copper, brass, polysulfone and RTV silicone.

The polysulfone case is suitable for intermittent or continuous service on natural gas provided a 0.013 throttle plug is installed in the socket.

Typical applications are, but not limited to: vacuum pumps, gas leak detectors, air compressors, air filters, gas burners, gas measurement, vacuum ovens, suction regulators and respirators.
Features
  • Glass-filled polysulfone case material, won’t rust or dent 
  • Beryllium copper diaphragm 
  • Brass socket 
  • Wetted materials of beryllium copper, brass, polysulfone and RTV silicone 
show more
The Ashcroft Type 1490 low pressure diaphragm gauge is designed to measure pressure from 10 in. H₂O to 15 psi, both positive and negative pressures.

This gauge uses a very sensitive diaphragm capsule to measure low pressure and vacuum.

The gauge is specifically designed for use whenever the pressure medium is a gas that is not corrosive to beryllium copper, brass, polysulfone and RTV silicone.

The polysulfone case is suitable for intermittent or continuous service on natural gas provided a 0.013 throttle plug is installed in the socket.

Typical applications are, but not limited to: vacuum pumps, gas leak detectors, air compressors, air filters, gas burners, gas measurement, vacuum ovens, suction regulators and respirators.
Features
  • Glass-filled polysulfone case material, won’t rust or dent 
  • Beryllium copper diaphragm 
  • Brass socket 
  • Wetted materials of beryllium copper, brass, polysulfone and RTV silicone 

Specifications

Movement

  • Brass

Materials of Construction

  • Dial (White Background, Black Figures & Intervals) & Pointer (Black): Aluminum
  • Socket: Brass

Pressure Type

  • Compound Pressure
  • Gauge
  • Vacuum

UNF/UNC Connection

  • 10-32 UNF Male

Enclosure, Body Material

  • Glass-Filled Polysulfone

Operating Temperature

  • -29° to 82.2° C (-20° to 180° F)

Burst Pressure

  • psi: 0 to 100 (kPa: 0 to 689.5, bar: 0 to 7)

Pressure Range

  • bar: 0 to 1
  • Inches WC: -200 to 300
  • kPa: 0 to 103.4
  • psi: 0 to 15

Size

  • Dial: 2.5” (63 mm)
  • Dial: 3.5” (89 mm)

Approvals & Certifications

  • ISO 9001

Proof Pressure

  • 150 % of Range

Wetted Materials

  • Beryllium Copper
  • Brass
  • Polysulfone
  • Silicone

NPT Connection

  • 1/4” NPT Male
  • 1/8” NPT Male

Lens

  • Polycarbonate Lens

Accuracy

  • ± 2-1-2 % of Full Scale (Grade A, ASME B40.100)
  • 1%

Tube Connection

  • 1/4” I.D. Tube
  • 1/4” O.D. Tube
  • 1/8” I.D. Tube
  • 3/16” I.D. Tube

Element

  • Sensing Element: Beryllium Copper Diaphragm

Name Plate, Tag Material

  • Paper
  • Stainless Steel

Typical Applications

  • Air Compressors
  • Filters
  • Gas Measurement, Burners & Leak Detectors
  • Specialized OEM Equipment
  • Suction Regulators & Respirators
  • Vacuum Ovens
  • Vacuum Pumps