Overview
The Marsh J1146 is part of Marsh Instruments’ General Service Steel Case Gauge series, offering cost-effective pressure measurement for a wide range of industrial and commercial applications. Available in multiple dial sizes (1-1/2″, 2″, 2-1/2″, 3-1/2″, 4-1/2″ diameter), the J1146 delivers economical, general-purpose measurement from vacuum/compound through 5,000 psi.
Key Features
- Available pressure ranges to 5,000 psi
- ASME Grade B accuracy (±3/2/3%, or ±2% across middle half of scale)
- Steel, black painted case with copper alloy tube and brass movement
- Suited for use with water, oil, air, gas, or other non-corrosive media
- Typical applications include FRLs, compressors, pumps, boilers, regulators, dryers and commercial/industrial equipment
Technical Specifications
- Case Material: Steel, black painted
- Tube & Socket: Copper alloy
- Movement: Brass
- Connection: 1/8″ and 1/4″ NPT
- Accuracy: ASME Grade B (±3/2/3%, ±2% of range across middle half of scale)
- Dial Sizes: 1-1/2″, 2″, 2-1/2″, 3-1/2″, 4-1/2″ diameter
- Pressure Range: 0–5,000 psi (multiple specific ranges available)
- Mount Styles: Center Back (CB), Lower Mount (LM), U-Clamp (UC) available
Typical Applications
Marsh Instruments general service gauges are used in OEM, commercial and industrial applications including pumps, machinery and related systems; steam boilers or other pressurized vessels; compressors; chemical processing; oil, gas and petrochemical systems; oil and gas pipeline monitoring; power plant equipment; and pulp and paper mills.
Compatibility & Replacements
Compatible With
- Any system requiring 1/8″ or 1/4″ NPT connection
- Pneumatic and hydraulic circuits operating to 5,000 psi
- Filter Regulator Lubricator (FRL) assemblies
- Compressor discharge and air distribution systems
- Boiler and pressure vessel monitoring installations
- Pump discharge and pressure control circuits
Replaces / Drop-In Replacement For
The J1146 is a baseline model number in Marsh’s General Service series. Related models include J1446, J1846, and J2046 (larger dial sizes). Contact your system integrator to verify the exact model and range needed for your application.
Works With
- Standard NPT thread pipe fittings (1/8″ and 1/4″)
- Industrial pressure systems and regulators using metric or imperial pressure units
- Multiple pressure range scales (psi, kPa, inches of water, bar, etc. depending on dial option)
