Overview
The Ametek US Gauge 138057A (model P845FFK) is a high-accuracy, general-purpose pressure gauge designed for industrial panel mounting and field applications. This 3-1/2″ dial gauge delivers reliable 0-200 PSI measurement with a front flange connection, making it ideal for monitoring compressed air systems, hydraulic lines, and pneumatic circuits in manufacturing, process control, and maintenance environments.
Key Features
- 3-1/2″ (89 mm) dial face for easy reading at a distance
- 0-200 PSI (0-14 bar) range, perfect for low-to-medium pressure applications
- Front flange mount configuration for direct installation without adapters
- Brass (copper alloy) wetted parts—corrosion-resistant for long service life
- Dry case construction (no liquid fill)—simple maintenance, reliable operation
- Adjustable pointer for zero correction in the field
- Black-painted steel case—durable finish resists chipping and oxidation
- 1/4″ NPT center back mount connection—standard industrial thread size
Technical Specifications
Verify all specifications against your system requirements before ordering.
- Dial Diameter: 3-1/2 inches (89 mm)
- Pressure Range: 0–200 PSI (0–14 bar)
- Connection: 1/4″ NPT (National Pipe Thread), center back mount
- Wetted Materials: Brass/copper alloy (internals), black-painted steel case
- Case Type: Dry (glycerin-free)
- Mount Style: Front flange
- Pointer Type: Adjustable (field-zeroing capability)
- Accuracy: Grade B (±1.6% of full scale, typical for industrial gauges)
- Bourdon Tube: Seamless, corrosion-resistant
- Operating Temperature: -40°F to +140°F (-40°C to +60°C) typical
Typical Applications
- Compressed air distribution and monitoring
- Pneumatic control and automation circuits
- Hydraulic system pressure verification
- Machine tool and process equipment monitoring
- Panel mount and field instrumentation
- Maintenance troubleshooting and system diagnostics
Compatibility & Replacements
Compatible With
- Standard 1/4″ NPT pneumatic and hydraulic systems
- Panel-mount installations with front flange configuration
- Industrial compressed air networks and regulators
- Low-to-medium pressure process lines (air, nitrogen, water)
Replaces / Drop-In Replacement For
- Previous model US Gauge 845FF series gauges with same specifications
- Standard 0-200 PSI general-purpose pressure gauges with 1/4″ NPT center back mount
- Verify specific application compatibility with your system integrator before substitution
Works With
- Pneumatic regulators and solenoid valve pilots
- Hydraulic pressure relief and control valves
- Compressors, dryers, and air distribution manifolds
- Industrial automation and process control systems
- No software or protocol integration required—mechanical gauge, direct pressure readout
