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Ashcroft 451259 process pressure gauge 0 to 3000 psi 4 1/2 in black case white dial

Ashcroft

Ashcroft 451259 process pressure gauge 0 to 3000 psi 4 1/2 in

SKU CH-13W8-KFD54

Measures process pressure from 0 to 3000 psi with a 4 1/2 in dial and ±0.5% accuracy

  • Product typeElectronic
  • +/- 0.5% accuracy for reliable readings
  • 0 to 3000 psi range covers high-pressure tasks
  • 4 1/2 inch dial for clear visibility
  • Glass lens protects against harsh environments
  • 1/2 inch NPT male connection fits standard piping

Ashcroft 451259 process pressure gauge

The Ashcroft 451259 is a process pressure gauge built for industrial measurement tasks where a 4 1/2 in dial and a 0 to 3000 psi range are required. It suits technicians and engineers monitoring hydraulic or pneumatic systems in plant maintenance and test environments. The NPT male connection and bottom mounting orientation fit standard panel and pipe installations.

Thermals noise and power draw

As a mechanical instrument, the gauge operates without electrical power and produces no audible noise or heat during normal use. Its polybutylene terephthalate case and glass lens withstand ambient conditions without active cooling or energy consumption. The dry dampening feature means there is no fill fluid to leak or degrade over time.

Sustained load behaviour

Under continuous pressure cycling up to 3000 psi, the gauge maintains its stated accuracy of +/- 0.5 percent without the vibration resistance or field-fillable options that some competing models offer. The lack of IP or NEMA rating indicates it is intended for protected indoor or sheltered locations rather than direct wash-down or harsh outdoor exposure.

How it compares

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

Price $80.99
Pricier than about 60% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameASHCROFT
Product typeElectronic

Questions about this item

How do I install the 1/2 in NPT male connection on the Ashcroft 451259 gauge, and what is the common mistake?

Apply PTFE tape or thread sealant to the male NPT threads and tighten with a wrench on the gauge case flats; the common mistake is turning the gauge by the 4 1/2 in dial housing, which can damage the internal bourdon tube.

What maintenance will the Ashcroft 451259 process pressure gauge require over time?

The gauge is not field fillable and has no dry dampening feature, so no fluid top-up is needed; periodically verify the +/- 0.5 percent accuracy against a calibrated standard and replace the unit if readings drift outside tolerance.

What is the first limit reached when the Ashcroft 451259 gauge operates continuously at high pressure?

The primary limit is the 3,000 psi upper range; sustained operation at or near this value can accelerate bourdon tube fatigue, and the polybutylene terephthalate case with no IP/NEMA rating offers no protection against environmental ingress.

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