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Stainless steel 2.5 inch pressure gauge with polycarbonate lens and 1/4 NPT bottom connection

Ashcroft

Ashcroft 251009 2.5in 400 psi 1/4 NPT 304 SS IP65

SKU CH-F8RD-V4E71

A 2.5 inch dial pressure gauge measuring 0 to 400 psi with 1.5 percent accuracy, 304 stainless steel case, 1/4 NPT male connection and IP65 rating when the vent plug is closed

  • Color/FinishStainless Steel
  • TypeElectronic
  • ±1.5 % accuracy for reliable readings
  • 304 stainless steel case resists corrosion
  • IP65 rating when vent plug is closed
  • 0–400 psi range covers industrial needs
  • Field-fillable design allows liquid damping

Industrial Pressure Gauge 0-400 psi

This Ashcroft 251009 gauge measures pressure from 0 to 400 psi with an accuracy of +/- 1.5 percent. The 2 1/2 inch dial uses a polycarbonate lens for clear reading. It suits technicians and engineers monitoring hydraulic or pneumatic systems in industrial environments.

Thermals Noise and Power Draw

The liquid-filled case dampens vibration and stabilises the needle without external power. Sealed construction achieves IP54 when the vent plug is open and IP65 when closed. No electrical supply or cooling is required for normal operation.

Build Quality and Connections

A 304 stainless steel case and 1/4 inch male NPT bottom connection resist corrosion in harsh conditions. The field-fillable design allows on-site fluid adjustment. NEMA 4 rating with the plug closed confirms suitability for wash-down and outdoor installations.

Highlights

  • ±1.5 % accuracy for reliable readings
  • 304 stainless steel case resists corrosion
  • IP65 rating when vent plug is closed
  • 0–400 psi range covers industrial needs
  • Field-fillable design allows liquid damping

Specifications

BrandASHCROFT
Color/FinishStainless Steel
TypeElectronic

Questions about this item

How do I install the 1/4 NPT bottom connection and which vent-plug step is often missed?

Thread the male NPT fitting into the port using pipe sealant on the threads only; after tightening, leave the vent plug closed to keep the IP65 rating, because opening it drops protection to IP54.

What maintenance will the liquid-filled 304 SS gauge need over time?

The case is field-fillable, so you can top up or replace the damping fluid if it discolours or leaks; the 304 stainless case and polycarbonate lens resist corrosion, but check the fill plug seal during any service.

At what pressure does the +/- 1.5 % accuracy limit become the dominant error under sustained use?

The calibrated span runs from 0 to 400 psi, so the fixed 1.5 % full-scale tolerance applies across the entire range; no separate over-pressure or temperature drift figure is published for this model.

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