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Miller-Smith pressure gauge black steel case brass fittings 0 to 400 psi 0 to 28 bar

Miller-Smith Equipment

Miller-Smith Equipment GA138-03 Pressure Gauge 0 to 400 psi 0 to 28 Bar

SKU CH-SJS6-ZQTHG

Measures pressure from 0 to 400 psi and 0 to 28 bar with a steel case, brass wetted parts and 1/4 in MNPT bottom connection

  • TypeElectronic
  • Accurate readings with +/-3-2-3% precision
  • Dual-scale 0-400 psi and 0-28 Bar range
  • Clear 2-inch dial with 10 psi graduations
  • Durable steel case with brass wetted parts
  • 1/4-inch MNPT bottom connection for easy mounting

Pressure Gauge for Welding Regulators

The Miller-Smith Equipment GA138-03 is a new electronic pressure gauge designed for welding regulator applications. It measures pressure from 0 to 400 psi with a secondary scale reading 0 to 28 Bar. The gauge features a steel case in black with brass and bronze wetted parts for durability. Accuracy is rated at +/-3-2-3 percent across the range.

Check Connection and Mounting Requirements

Verify that your regulator uses a 1/4 inch MNPT bottom connection before ordering. This gauge is not panel mountable and is not liquid filled, so ensure your installation suits a dry, stem-mounted instrument. The primary scale is numbered every 100 psi with the smallest graduation at 10 psi for precise reading.

Basic Gauge Supplied Without Calibration Certificate

The unit ships as a basic gauge only; no calibration certificate is included in the package. Users requiring certified accuracy for compliance or quality records must arrange independent calibration separately. The steel case and brass wetted parts are the only hardware provided.

Highlights

  • Accurate readings with +/-3-2-3% precision
  • Dual-scale 0-400 psi and 0-28 Bar range
  • Clear 2-inch dial with 10 psi graduations
  • Durable steel case with brass wetted parts
  • 1/4-inch MNPT bottom connection for easy mounting

Specifications

BrandMILLER ELECTRIC
TypeElectronic

Questions about this item

What comes in the box with the Miller-Smith GA138-03 pressure gauge and what must be purchased separately?

The gauge itself is supplied new in its steel case with brass and bronze wetted parts, a 1/4 in MNPT bottom connection and dual-scale dial reading 0 to 400 psi and 0 to 28 bar. No calibration certificate is included, so certification must be arranged separately if required.

Which version of the GA138-03 should I choose for my application?

Only one version is listed: a 2 in electronic gauge with a black steel case, bottom-mounted 1/4 in MNPT connection, ±3-2-3 % accuracy and 10 psi smallest graduation. There are no alternative capacities or case styles to select from.

What does the 400 psi / 28 bar rating mean when the gauge is installed on a regulator?

The dial spans 0 to 400 psi (0 to 28 bar) with numbered marks every 100 psi and minor ticks every 10 psi. The ±3-2-3 % accuracy applies across this full range, so at mid-scale the reading will be within about ±6 psi of true pressure.

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