Overview
The ENFM 4104-3 pressure gauge is an industrial-grade instrument designed for precise pressure measurement in HVAC, boiler, and hydronic heating applications. This gauge combines robust construction with field-proven accuracy, making it a trusted choice for technicians and system integrators who require reliable diagnostics in high-temperature environments. With its 70–200 PSI operating range and 320°F temperature rating, the 4104-3 series handles demanding closed-loop heating circuits and steam system monitoring.
Key Features
- Industrial-Grade Accuracy: ±3–2–3% pressure accuracy and ±3% temperature accuracy per full scale
- Wide Temperature Rating: Operates safely up to 320°F for high-temperature applications
- Dual-Mount Design: 1/4–1/2 NPT connection options for flexible installation in tight mechanical rooms
- Heavy-Duty Construction: Steel case and brass wetted parts withstand vibration and mechanical stress
- Back-Mount Configuration: Compact center-back design fits confined piping layouts without requiring extensive rework
Technical Specifications
- Model Number: ENFM 4104-3 (HD11C4HC2H48L variant)
- Pressure Range: 70–200 PSI
- Temperature Range: 70–320°F
- Connection Type: 1/4–1/2 NPT back mount
- Case Material: Steel
- Wetted Parts: Brass
- Pressure Accuracy: ±3–2–3% of span
- Temperature Accuracy: ±3% of full scale
- Operating Environment: Industrial, HVAC, boiler systems
Typical Applications
The ENFM 4104-3 is ideal for:
- Residential and light commercial boiler pressure monitoring
- Hydronic heating system diagnostics and balancing
- Low-pressure steam system measurements
- Closed-loop thermal expansion monitoring
- HVAC system safety checks and maintenance
- Mechanical room instrumentation where space is limited
Compatibility & Replacements
Compatible With
- HVAC/boiler system manifolds with 1/4–1/2 NPT threaded ports
- Closed-loop hydronic heating circuits (70–200 PSI)
- Low-pressure steam applications
- System diagnostic and balancing equipment
- OEM boiler and furnace installations
Replaces / Drop-In Replacement For
Verify your current gauge model number and port configuration before ordering. The ENFM 4104 series is commonly used as a direct replacement in boiler and hydronic systems. Contact your system integrator or technician to confirm compatibility with your specific installation.
Works With
- Manual HVAC balancing procedures
- System pressure relief valves and expansion tanks
- Boiler high-limit and safety switches
- Field diagnostic equipment for technician troubleshooting
- OEM boiler and furnace control systems
