Johnson Controls P499RCP-105K Pressure Transducer

The Johnson Controls P499RCP-105K is a precision-engineered electronic pressure transducer designed for high-accuracy performance in heavy-duty HVACR applications. Operating on a 0.5 to 4.5 Vdc ratiometric output, this sensor provides linear feedback for monitoring discharge, suction, or head pressure in demanding environments. With a pressure range of 0 to 500 psi, the P499 series utilizes thin-film technology to ensure long-term stability and resistance to pressure spikes and vibration. This specific kit features a 1/4" SAE 45-degree flare internal thread for secure mechanical coupling and includes a Packard electrical connection with a 6.6-foot wiring harness for immediate integration into control circuits. Built with a stainless steel construction, it is compatible with all common non-corrosive refrigerants, including R410A and R134a. For contractors replacing failed transducers in chiller sequences or condenser fan cycling controls, this unit offers the reliable voltage-to-pressure signal required for precise system regulation and efficiency.

• Enhanced Durability: The thin-film sensing element is isolated from the medium, preventing drift and ensuring high-cycle life in high-pressure refrigeration systems.
• Seamless Integration: The included 6.6-foot wiring harness and Packard connector simplify field installation and retrofitting.
• Environmental Protection: Rated for high-vibration and harsh temperature environments common in commercial rooftop and refrigeration rack applications.
• Verified Accuracy: Provides repeatable data points for variable frequency drives (VFD) and electronic controllers to optimize head pressure management.

What is the primary application for a 0-500 psi range transducer?
This range is typically utilized for high-side pressure monitoring in R410A systems or head pressure control in commercial refrigeration to manage fan cycling and expansion valve performance.

Is this transducer compatible with ammonia systems?
No, the P499RCP-105K is designed for use with non-corrosive refrigerants. For ammonia or corrosive media, a specialized stainless steel variant with specific seals is required.

What does a ratiometric output mean for my controller?
The 0.5 to 4.5 Vdc output is proportional to the input supply voltage. If your controller provides a 5V reference, the signal will scale accurately, ensuring the HVAC controller interprets the pressure correctly across the full 500 psi span.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.