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Miller® 2" Steel 200 psi Pressure Gauge

Miller® 2" Steel 200 psi Pressure Gauge

By
Miller Electric Manufacturing

Airgas Part #:MILGA140-03

Manufacturer Part #:GA140-03


$27.88 /Each
Each

Item Details

  • The ITW / Miller Electric (formerly Miller Smith) GA140-03 is an industrial-grade dual-scale replacement pressure gauge designed for compressed gas welding regulators, manifolds, and gas delivery systems. It serves as a delivery (low-pressure/outlet) gauge for monitoring gas flow and pressure in fabrication and industrial environments.

Features

  • Dual-Scale Layout: Displays PSI on the outer ring and BAR on the inner ring for cross-reference without conversion.
  • Shatter-Resistant Polycarbonate Lens: One-piece design with 1/4-turn crystal ring to resist impact from slag and sparks.
  • Safety-Vented Case: Engineered to vent from the back or perimeter during internal Bourdon tube failure to protect the operator.
  • High-Visibility Dial Face: Contrast-optimized white lettering against a dark base for low-light environments.
  • Parallax Mitigation: Cupped steel face design reduces reading errors from side angles.
  • Mechanical Movement: Watch-type gear movement designed for rapid pressure fluctuations.
  • Indicator: Fixed, non-adjustable balanced indicator needle.
  • Structural Integrity: Solid forged brass base for high torque resistance during installation.

Specifications

  • Manufacturer: ITW / Miller Electric (formerly Miller Smith)
  • Manufacturer Part Number (MPN): GA140-03
  • Global Trade Item Number (GTIN): 014495263895
  • UNSPSC Code: 41112403
  • Dial Diameter: 2 inches nominal (50.8 mm)
  • Primary Scale Range: 0 to 200 PSI
  • Secondary Scale Range: 0 to 14 BAR
  • Primary Scale Minor Graduations: 2 PSI increments
  • Secondary Scale Minor Graduations: 0.5 BAR increments
  • Accuracy Classification: ASME B40.100 Grade B (Class B)
  • Accuracy Profile: ± 3-2-3% of span
  • Process Connection: 1/4" NPT Male (MNPT)
  • Connection Location: Bottom Port / Lower Stem Mount
  • Case Material: Heavy-gauge Steel, Black Enamelled
  • Lens Material: Molded Polycarbonate (Shatterproof)
  • Process Socket Material: Solid Forged Brass
  • Sensing Element: Phosphor Bronze Bourdon Tube (C-shaped)
  • Internal Movement: Brass / Engineered Alloy
  • Wetted Parts: Brass and Bronze
  • Package Length: 7.00 inches (177.8 mm)
  • Package Width: 4.00 inches (101.6 mm)
  • Package Height/Thickness: 1.00 inch (25.4 mm)
  • Net Weight: 0.32 lbs (0.145 kg)
  • Standards Compliance: UL Listed, ASME B40.100

Applications

  • Primary Equipment: Direct replacement delivery gauge for Miller Smith Series 30 welding regulators.
  • Gas Compatibility: Argon (Ar), Argon/CO2 Blends, Helium (He), Nitrogen (N2), and Compressed Air.
  • Industrial Use Cases: MIG/TIG shielding gas lines, HVAC line pressure-testing, purging, and pneumatic shop air lines.
  • Oxygen Service Restriction: NOT factory-cleaned or certified for Oxygen (O2) service; risk of spontaneous combustion.
  • Corrosive Gas Restriction: Not compatible with Ammonia, Hydrogen Sulfide (H2S), or other sour gases that attack copper alloys.
  • Installation Requirement: Requires gas-compatible thread sealant (PTFE tape) and torque application via brass wrench flats only.

Product Attributes

Product Type

» Pressure Gauge

Gauge Diameter

» 2"

Material

» Steel

Thread Size/Type

» 1/4" NPT

Connection Location

» Bottom Port

Color

» Black

Calibration

» 200 psi

» Show more details and specs