Overview
The Orange Research 1201PG-1A-2.5B is a differential pressure gauge designed for accurate pressure measurement in industrial applications up to 3000 PSI. This piston-type gauge features a 2.5-inch basic dial case with aluminum in-line ports and BUNA seals, making it suitable for pneumatics, hydraulics, filtration, flow monitoring, and plumbing systems. The gauge uses a direct-reading mechanical design with no electronics, ensuring reliable operation in harsh environments.
Key Features
- Piston differential pressure measurement design for accurate readings
- 2.5-inch dial case with clear, easy-to-read markings
- 1/4″ FNPT aluminum in-line ports for flexible installation
- 3000 PSI maximum pressure rating with 200 bar equivalent
- BUNA seals for compatibility with mineral oils and standard fluids
- Operating temperature range: 0°F to 150°F (standard hydraulic environment)
Technical Specifications
- Maximum Pressure Rating: 3000 PSI (200 bar)
- Dial Size: 2.5 inches
- Port Type: 1/4″ FNPT (Female National Pipe Thread)
- Gauge Type: Piston differential pressure
- Wetted Parts Material: Aluminum
- Seal Material: BUNA (Nitrile)
- Maximum Operating Temperature: 150°F (66°C)
- Weight: 0.95 lbs (0.43 kg)
- Mounting: Inline with female threaded ports
Typical Applications
- Filtration system pressure monitoring and bypass indication
- Hydraulic system pressure measurement and diagnostics
- Pneumatic pressure monitoring in compressed air systems
- Pump discharge pressure verification
- Flow rate measurement and system validation
- Plumbing and water system pressure gauges
- Equipment diagnostics and preventive maintenance
Compatibility & Replacements
Compatible With
- Hydraulic power units and closed-loop systems
- Pneumatic distribution systems and compressors
- Filtration packages (high-flow and offline)
- Pump systems up to 3000 PSI capacity
- Industrial fluid transfer applications
- Standard ISO VG hydraulic fluids and mineral oils
Replaces / Drop-In Replacement For
- Earlier Orange Research 1201 series gauges with matching port configurations
- Generic 2.5-inch differential pressure gauges with 1/4″ FNPT ports in the 0–150 PSID range
Works With
- Hydraulic systems rated to 3000 PSI line pressure
- Pneumatic systems up to 200 bar (approximately 3000 PSI)
- Mineral oil-based fluids (ISO VG 22, 46, 68)
- Water and glycol-based fluids with compatible seals
- Standard industrial pressure line connections (female NPT fittings)
