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Black steel low-pressure diaphragm gauge with 2-1/2 inch dial and center back connection

Value Brand

Value Brand 18C802 Low Pressure Diaphragm Gauge 2-1/2 In

SKU CH-NJ52-4SYEB

Measures low pressure with a diaphragm sensor and 1.5 percent accuracy

  • Product typeElectronic
  • +/- 1.5 % accuracy for reliable low-pressure readings
  • Diaphragm sensor with copper-alloy construction resists corrosion
  • Steel case with polycarbonate lens protects the movement
  • 1/4 in male NPT center-back connection simplifies installation
  • New condition ensures full factory calibration out of the box

Low Pressure Diaphragm Gauge

This low pressure diaphragm gauge measures system pressure with a copper alloy sensor and a polycarbonate lens. The steel case provides durability for workshop and industrial environments. It is built for technicians who need reliable readings on compatible low pressure systems.

Center Back NPT Connection

The gauge features a male 1/4 inch NPT process connection located at the center back for direct mounting. No panel cutout is required because the unit is not panel mountable. This orientation keeps the dial visible while the connection points toward the pressure source.

Replaces Worn Low Pressure Gauges

The +/- 1.5 percent accuracy restores measurement confidence when an old gauge drifts or the lens clouds. The jump is worth it when calibration can no longer bring the reading back within tolerance. Not suited for applications that require a hazardous location rating or panel mounting.

How it compares

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

Price $24.99
Cheaper than about 71% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameZORO SELECT
Product typeElectronic

Questions about this item

How accurate is the 18C802 gauge when measuring low pressure continuously?

The gauge maintains an accuracy of ±1.5 percent of full scale during sustained low-pressure measurement.

Does the steel case and polycarbonate lens handle heat buildup during all-day operation?

The steel case and polycarbonate lens are built for continuous indoor use; the gauge carries no IP or hazardous-location rating, so avoid wet or classified areas.

What thread do I need on my system to install this 1/4 inch NPT male connection?

You need a female 1/4 inch NPT port on your pipe or manifold to accept the gauge's center-back male connection.

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