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Black round gauge with white dial and glass lens, bottom NPT connection

Ashcroft

Ashcroft 451259 Process Pressure Gauge 0 to 5000 psi 4 1/2 in

SKU CH-XWS9-XXQMW

A process pressure gauge measuring 0 to 5000 psi with a 4 1/2 in dial and ±0.5% accuracy

  • Product typeElectronic
  • +/- 0.5% accuracy for precise process readings
  • 0 to 5000 psi range covers demanding industrial applications
  • 4 1/2 in dial size enables clear visibility at distance
  • Polybutylene terephthalate case resists harsh chemical environments
  • 1/2 in NPT male connection fits standard process piping

Ashcroft 451259 Process Pressure Gauge

The Ashcroft 451259 is a process pressure gauge built for industrial pressure measurement. It covers a primary pressure range of 0 to 5000 psi with an accuracy of +/- 0.5 percent. The gauge features a nominal dial size of 4 1/2 in with a white dial and glass lens for clear reading. It suits technicians and engineers who need reliable process monitoring in demanding environments.

Sustained Load Performance

This gauge maintains its +/- 0.5 percent accuracy across the full 0 to 5000 psi range during continuous operation. The polybutylene terephthalate case provides chemical resistance for long-term exposure to process media. No dry dampening feature or specific vibration resistance is included, so performance depends on stable mounting conditions. It is not intended for applications requiring liquid-filled dampening or high-vibration tolerance.

Build Quality and Connections

The case uses black polybutylene terephthalate material for durability and chemical compatibility. A 1/2 in male NPT process connection at the bottom allows direct piping installation. The glass lens protects the dial while maintaining visibility. The gauge is not field fillable and carries no IP or NEMA rating, limiting use to protected indoor or sheltered locations. Buyers needing liquid filling or environmental sealing should consider other options.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $71.99
Pricier than about 57% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameASHCROFT
Product typeElectronic

Questions about this item

Does the Ashcroft 451259 generate any heat or noise when monitoring 5000 psi continuously?

The gauge is a mechanical instrument with no powered components, so it produces no heat or audible noise during continuous operation at any pressure up to 5000 psi.

What existing fittings are required to install the 1/2 in NPT male process connection?

You need a mating 1/2 in NPT female port on your process piping or vessel; the gauge threads directly into that opening with no additional adapters.

Will the +/- 0.5 percent accuracy hold when the gauge is mounted beside older analogue gauges on the same manifold?

Accuracy is determined by the gauge's own calibration and is unaffected by adjacent instruments; each device reads independently on the shared manifold.

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