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Ashcroft 451279 pressure gauge black phenolic case white dial glass lens 0 to 3000 psi bottom connection

Ashcroft

Ashcroft 451279 0-3000 psi 4-1/2in Pressure Gauge

SKU CH-RBV1-47SRF

A 4-1/2 inch phenolic-case pressure gauge measuring 0 to 3000 psi with ±0.5 percent accuracy, glass lens and dry vibration-dampened movement

  • TypeElectronic
  • +/- 0.5% accuracy for reliable pressure readings
  • 0 to 3000 psi range suits high-pressure applications
  • 4-1/2 inch dial provides clear visibility
  • Phenolic case resists corrosion in harsh environments
  • Dry PLUS! Performance dampens vibration without liquid fill

What this pressure gauge does

The Ashcroft 451279 is a process pressure gauge built for industrial and commercial monitoring where reliable readings up to 3000 psi are required. Its 4-1/2 inch dial and 0.5 percent accuracy suit technicians and engineers who need dependable measurement in demanding environments.

Thermals noise and power draw

This gauge operates mechanically without electronic components, so it generates no heat, produces no audible noise and draws no electrical power during normal use. The dry vibration-dampened case absorbs shock without requiring a fill fluid or external energy source.

The spec that decides fit

The 1/2 inch male NPT bottom connection determines whether this gauge will thread directly into your existing port or if an adapter is needed; buyers with a different thread size or a rear-entry requirement will need another solution.

Highlights

  • +/- 0.5% accuracy for reliable pressure readings
  • 0 to 3000 psi range suits high-pressure applications
  • 4-1/2 inch dial provides clear visibility
  • Phenolic case resists corrosion in harsh environments
  • Dry PLUS! Performance dampens vibration without liquid fill

Specifications

BrandASHCROFT
TypeElectronic

Questions about this item

How is the 1/2 in NPT male connection installed on the Ashcroft 451279 gauge, and what step is often missed?

Thread the 1/2 in NPT male connection into the process port using a wrench on the gauge's wrench flats; the step often missed is applying PTFE tape or pipe sealant to the threads before tightening to prevent leaks.

What maintenance will the glass lens and phenolic case need over time?

Inspect the glass lens regularly for cracks or clouding and clean with a non-abrasive cloth; check the black phenolic case for chemical damage or UV degradation, replacing the gauge if the case shows cracking or the dial becomes unreadable.

At what point does the +/- 0.5 percent accuracy limit become unreliable under sustained 3000 psi vibration?

The PLUS! Performance dampening controls needle flutter, but sustained vibration at the top of the 0 to 3000 psi range can gradually shift the Bourdon tube, causing readings to drift beyond the stated +/- 0.5 percent accuracy.

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