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Black phenolic process pressure gauge 4-1/2 inch dial white face 1/2 inch NPT bottom mount

Ashcroft

Ashcroft 451279 Process Pressure Gauge 0-60 psi 4-1/2in 1/2in NPT

SKU CH-HX99-6VG97

Measures process pressure from 0 to 60 psi with ±0.5% accuracy on a 4.5-inch white dial housed in a black phenolic case with a 1/2-inch NPT bottom connection

  • Color/FinishBlack
  • TypeElectronic
  • ±0.5 % accuracy for precise process monitoring
  • 4 1/2 in dial gives clear, readable pressure indication
  • 1/2 in NPT male connection fits standard piping
  • phenolic case resists corrosion in harsh environments
  • glass lens protects dial from impact and contamination

Ashcroft 451279 Process Gauge

The Ashcroft 451279 is a new process pressure gauge built for industrial monitoring where reliable local indication is required. It serves plant operators and maintenance technicians who need a clear reading of system pressure without electronic signal output.

4-1/2in Phenolic Case with Glass Lens

The gauge uses a black phenolic case measuring 4-1/2 inches nominal dial size and a glass lens for durability. A white dial with black markings provides high contrast. The unit is rated to an accuracy of +/- .5 percent across the 0 to 60 psi range and carries no IP or NEMA rating.

1/2in NPT Bottom Connection

The process connection is a 1/2 inch male NPT thread located at the bottom with a bolt circle diameter of 5.375 inches for panel mounting. The gauge is not field fillable and has no dry dampening or vibration resistance features, so it suits steady-pressure applications rather than pulsating or high-vibration environments.

Highlights

  • ±0.5 % accuracy for precise process monitoring
  • 4 1/2 in dial gives clear, readable pressure indication
  • 1/2 in NPT male connection fits standard piping
  • phenolic case resists corrosion in harsh environments
  • glass lens protects dial from impact and contamination

Specifications

BrandASHCROFT
Color/FinishBlack
TypeElectronic

Questions about this item

How do I install the Ashcroft 451279 gauge with its 1/2 in NPT male bottom connection, and what step is often missed?

Thread the 1/2 in NPT male connection into the process port using appropriate sealant; the step often missed is ensuring the phenolic case is not used as a wrench surface, which can crack the housing.

What maintenance will the Ashcroft 451279 require over time?

Since the gauge is not field fillable and has no dampening fluid, maintenance is limited to periodic verification of the +/- 0.5 percent accuracy against a calibrated standard and inspection of the glass lens for damage.

What is the first limit reached on the Ashcroft 451279 during sustained pressure cycling at the 60 psi range?

The primary limit is the +/- 0.5 percent accuracy specification; with no vibration resistance or dampening feature, sustained cycling can cause pointer fatigue or bourdon tube drift beyond this tolerance first.

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