Description
The Johnson Controls P499RCH-401 is a precision pressure transducer engineered for demanding HVAC and building automation applications. Delivering a ratiometric 0.5 to 4.5 Vdc output signal, this transducer provides accurate, repeatable pressure measurement across a wide -1 to 8 bar operating range — making it equally capable of sensing vacuum and positive pressure conditions in refrigeration, chiller, and hydronic systems.
Key Features
- Ratiometric output signal: 0.5 to 4.5 Vdc for direct interface with BAS/DDC controllers
- Wide pressure range: -1 to 8 bar (-14.5 to 116 PSI) for versatile system monitoring
- 1/4″ SAE 45-degree flare internal thread process connection for secure, leak-free installation
- Hirschmann Form C connector with mating cable socket included for fast, tool-free field wiring
- Compact, rugged construction suitable for commercial and industrial HVAC environments
Process Connection & Wiring
The 1/4″ SAE 45-degree flare internal thread connection is a standard fitting widely used in refrigeration and HVAC piping, ensuring compatibility with existing system infrastructure. The Hirschmann Form C connector — supplied complete with a mating cable socket — simplifies field installation and allows for quick disconnect during servicing, reducing downtime and labor costs.
Output Signal & Controller Compatibility
The 0.5 to 4.5 Vdc ratiometric output is compatible with a broad range of Johnson Controls and third-party DDC controllers, PLCs, and building automation systems. The ratiometric design ensures output accuracy tracks the supply voltage, minimizing errors due to supply fluctuations.
Typical Applications
- Refrigerant suction and discharge pressure monitoring
- Chiller and heat pump system pressure sensing
- Hydronic system pressure measurement
- Building automation and energy management systems
- Commercial HVAC equipment OEM integration
Specifications
- Model: P499RCH-401
- Brand: Johnson Controls
- Output Signal: 0.5 to 4.5 Vdc (ratiometric)
- Pressure Range: -1 to 8 Bar (-14.5 to 116 PSI)
- Process Connection: 1/4″ SAE 45-Degree Flare, Internal Thread
- Electrical Connector: Hirschmann Form C with Mating Cable Socket
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