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A4A Precision Pressure Gauge

Brand: Ashcroft Inc

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The Ashcroft precision pressure gauge yields consistent, reliable accuracy through the use of state-of-the-art precision machining and the world’s most refined bourdon tube technology.

This eliminates the need for a power source and precludes the associated problems such as susceptibility to electronic line noise, power outage or potential fire hazard.

In addition, this mechanical instrument is simple to operate, easy to troubleshoot, and can be readily flushed or purged to remove foreign matter or trapped gas.

Accurate and reliable, the Ashcroft A4A sets a new standard for precision test gauges.
Features
  • ±0.1% of Full Scale accuracy – ASME B40.1, Grade 4A 
  • Ranges from psi 15 to 100,000 (kPa: 103.4 to 689,500, bar: 1 to 6,895) 
  • Solid front protective case 
  • High and low pressure limit stops 
  • Mirror band dial to eliminate parallax reading error 
  • Optional temperature compensation maintains 0.1% accuracy from -31° to 51.6° C (-25° to 125° F) 
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The Ashcroft precision pressure gauge yields consistent, reliable accuracy through the use of state-of-the-art precision machining and the world’s most refined bourdon tube technology.

This eliminates the need for a power source and precludes the associated problems such as susceptibility to electronic line noise, power outage or potential fire hazard.

In addition, this mechanical instrument is simple to operate, easy to troubleshoot, and can be readily flushed or purged to remove foreign matter or trapped gas.

Accurate and reliable, the Ashcroft A4A sets a new standard for precision test gauges.
Features
  • ±0.1% of Full Scale accuracy – ASME B40.1, Grade 4A 
  • Ranges from psi 15 to 100,000 (kPa: 103.4 to 689,500, bar: 1 to 6,895) 
  • Solid front protective case 
  • High and low pressure limit stops 
  • Mirror band dial to eliminate parallax reading error 
  • Optional temperature compensation maintains 0.1% accuracy from -31° to 51.6° C (-25° to 125° F) 

Specifications

Accuracy

  • ± 0.1 % of Span (ASME B40.1 Grade 4A)

Mounting

  • Panel Mount
  • Wall Mounting Bracket

UNF/UNC Connection

  • 9/16”-18 UNF Female-2B

Repeatability

  • ± 0.02 % of Span

NACE & NIST

  • NIST

Materials of Construction

  • Bourdon Tube: 403 Stainless Steel
  • Bourdon Tube: Beryllium Copper

Compensated Temperature

  • Bi-Metallic: Eliminates Temperature Errors from -31.6° to 51.6° C (-25° to 125° F)

Sensitivity

  • 0.01 % of Span

Size

  • Dial: 12”
  • Dial: 16” (406.4 mm)
  • Dial: 6” (152.4 mm)
  • Dial: 8.5” (215.9 mm)

Approvals & Certifications

  • ISO 9001
  • Mill Certificate-STD-45662

Pressure Type

  • Absolute
  • Compound Pressure
  • Vacuum

NPT Connection

  • 1/4” NPT Female
  • 1/4” NPT Male
  • 1/8” NPT Female
  • 1/8” NPT Male

Pressure Range

  • bar: 0 to 6,895
  • Inches Hg: -30 to 1,000
  • Inches WC: 0 to 1,000
  • kPa: 0 to 689,500
  • psi: 0 to 100,000

Length

  • Scale Length: 18 to 43.25” (457.2 to 1,099 mm)

Hysteresis

  • < 0.1 % of Span

MS (Military) Connection

  • MilG18997D Female
  • MS16142 Female
  • MS33649-4 Female
  • MS33656-4 Male

Typical Applications

  • Calibration Labs
  • Precision Test & Measurement Validation
  • Test Laboratories