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Round steel-cased low-pressure gauge with a 2 1/2 inch dial and center-back 1/4 inch NPT connection

Value Brand

Value Brand Low Pressure Gauge 0 to 30 psi 2 1/2 in Dial 1/4 in NPT 18C801

SKU CH-21KQ-20KB3

Measures low pressure up to 30 psi with ±1.5% accuracy on a 2½-inch dial and ¼-inch NPT connection

  • TypeElectronic
  • Accurate readings with ±1.5% full-scale precision
  • 0 to 30 psi range covers low-pressure tasks
  • 2 1/2 in dial gives clear visibility
  • 1/4 in NPT centre-back connection fits standard fittings
  • Steel case with polycarbonate lens resists daily wear

Low Pressure Gauge 0 to 30 psi

This low pressure gauge measures from 0 to 30 psi with a 2 1/2 in dial and a 1/4 in NPT centre back connection. It is suited for technicians monitoring low-pressure air or gas systems in automotive and industrial settings. The diaphragm sensor and copper alloy socket provide reliable readings for compatible media.

Accuracy and build materials

Accuracy is rated at +/- 1.5 percent of full scale across the operating range. The case is constructed from steel with a polycarbonate lens protecting the dial. Sensor and socket components use copper alloy HPb59-1 for corrosion resistance in standard environments.

Panel mounting and connection limits

This model is not panel-mountable and carries no IP or NEMA rating, so it is not suited for wash-down or hazardous locations. The 1/4 in male NPT fitting limits direct installation to matching female ports. Buyers needing panel mounting, higher pressure ranges or environmental sealing should select a different gauge.

Highlights

  • Accurate readings with ±1.5% full-scale precision
  • 0 to 30 psi range covers low-pressure tasks
  • 2 1/2 in dial gives clear visibility
  • 1/4 in NPT centre-back connection fits standard fittings
  • Steel case with polycarbonate lens resists daily wear

Specifications

BrandZORO SELECT
TypeElectronic

Questions about this item

How do I install the 1/4 in NPT center-back connection without cross-threading the copper-alloy socket?

Start the male NPT threads by hand until they engage smoothly, then tighten with a wrench on the hex flats — do not force the first turns or the soft copper-alloy HPb59-1 threads can gall.

What part will need replacement first on this diaphragm gauge?

The copper-alloy diaphragm and socket are the wetted components; over time they can fatigue or corrode, so plan to replace the entire gauge when readings drift beyond the ±1.5 % accuracy spec.

At what pressure does the gauge hit its limit during sustained use?

The scale stops at 30 psi; running the sensor continuously at or near that upper end will cause the diaphragm to reach its mechanical limit first.

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