Johnson Controls P499ACP-105K Pressure Transducer

The Johnson Controls P499ACP-105K is a field-proven electronic pressure transducer designed for rigorous performance in HVACR control systems. Engineered with a 17-4PH stainless steel construction, this transducer provides a linear 4-20 mA output signal over an operating 0-500 PSI pressure range. As a veteran-grade HVAC pressure sensor, it features a 1/4" SAE flare internal thread with an integrated Schrader depressor (Style 47), allowing for direct mounting without specialized tools. The unit is digitally compensated to maintain a 1% total error band, ensuring high-accuracy data even when subjected to extreme temperature swings, condensation, or icing. Each kit includes a 6.5' wire harness (Packard connector) for versatile installation across commercial refrigeration, chillers, and fan speed control applications.

• All-Metal Sealed System: Constructed from a single piece of 17-4PH stainless steel with no O-rings or welds exposed to media, preventing leaks in high-vibration environments.
• Environmental Protection: Encapsulated electronics resist moisture and icing, making this P499 series kit ideal for suction and discharge line monitoring.
• Ammonia Compatible: The stainless steel wetted parts are safe for use with ammonia and other non-corrosive refrigerants.
• Broad Operating Range: Maintains precise performance across a wide temperature spectrum from -40°F to 185°F.

What is the proper wiring for the 4-20 mA loop?
The P499ACP-105K operates on a 9-30 VDC supply (Class 2). In a standard 2-wire loop, the supply voltage is connected to the transducer, and the loop current is measured by the controller to calculate the precise PSI pressure range.

Can I use this for high-side discharge pressure?
Yes. With a max rating of 0-500 PSI, this transducer is commonly used for head pressure control and discharge monitoring in R-410A and R-134a systems.

Does this kit include everything needed for installation?
The kit includes the P499 pressure transducer and the matching 6.5' wire harness with a weather-tight Packard connector, facilitating a complete field replacement or new install.

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.