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Stainless steel case industrial compound gauge with 4 1/2 in acrylic dial, bottom 1/4 in NPT male connection

Value Brand

Value Brand Industrial Compound Gauge 30 to 0 to 30 psi 4 1/2 in Dial 18C741

SKU CH-MHRD-HN8NG

Measures pressure and vacuum from 30 to 0 to 30 psi with 1.0 percent accuracy on a 4 1/2 inch dial

  • TypeElectronic
  • Accurate readings with ±1.0% precision
  • Compound range spans 30 to 0 to 30 psi
  • Large 4 1/2 in dial for easy viewing
  • Durable stainless steel case resists corrosion
  • Copper alloy internals handle non‑explosive media

Industrial Compound Gauge 30 to 0 to 30 psi

This ZORO SELECT industrial compound gauge measures pressure and vacuum on a single 4 1/2 in dial. It covers a range of 30 to 0 to 30 psi with an accuracy of +/- 1.0 percent. The gauge suits technicians monitoring non-explosive gas or liquid that does not crystalize or corrode copper alloy.

Stainless steel case with acrylic lens

The gauge case uses stainless steel and the lens uses acrylic. The sensor and socket are copper alloy HPb59-1. A 1/4 in male NPT bottom connection fits standard ports. This construction replaces gauges lacking these specific wetted materials or connection details.

Check media compatibility

Verify the process media is compatible with copper alloy wetted parts. Confirm the system uses a 1/4 in female NPT port at the bottom mounting location. The gauge carries no IP, NEMA or hazardous location rating. California Proposition 65 warnings apply for cancer and reproductive harm.

Highlights

  • Accurate readings with ±1.0% precision
  • Compound range spans 30 to 0 to 30 psi
  • Large 4 1/2 in dial for easy viewing
  • Durable stainless steel case resists corrosion
  • Copper alloy internals handle non‑explosive media

Specifications

BrandZORO SELECT
TypeElectronic

Questions about this item

What size NPT thread does the 1/4 in bottom connection require for mounting?

The gauge uses a 1/4 in male NPT process connection at the bottom, so a matching female NPT fitting is needed.

How should the copper alloy socket be sealed during installation to avoid leaks?

Apply PTFE tape or thread sealant on the 1/4 in male NPT threads and tighten with a wrench on the hexagonal socket flats, not the case.

Which process media will eventually require gauge replacement due to sensor incompatibility?

Any media that crystallises or corrodes copper alloy will damage the sensor and socket, requiring full gauge replacement.

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