Resideo 198799Z Sensor

The Resideo 198799Z Sensor is a high-precision NTC thermistor designed for demanding hydronic applications, providing reliable temperature feedback for outdoor reset or supply water monitoring. Engineered for seamless integration with Resideo AQ475, AQ675, and AQ775 Aquastat controllers, this sensor is technically identical to the 198799Z/U model, ensuring a drop-in replacement for existing HVAC systems. Featuring a 42-inch skinned-and-retained lead wire, the 198799Z enables flexible terminal connections within a SOLA Hydronic Control ecosystem. The 3/8-inch diameter copper bulb is rated for temperatures up to 257°F (125°C), making it suitable for high-limit supply monitoring or outdoor ambient sensing. By delivering accurate real-time data to the controller, the Resideo 198799Z optimizes boiler firing rates and enhances overall system efficiency, reducing fuel consumption while maintaining consistent indoor climate control for commercial and residential hydronic loops.

• Universal Compatibility: Fully compatible with Resideo AQ series Aquastat panels and SOLA Hydronic Control systems for streamlined field installation.
• High-Temperature Durability: The 3/8-inch copper bulb and lead wire assembly are rated for 257°F, ensuring long-term stability in high-heat supply lines.
• Precise Response: Utilizes a single-element NTC thermistor to provide the rapid, accurate resistance-to-temperature conversion required for outdoor reset curves.
• Simplified Wiring: Includes a 42-inch lead with strip-and-retain ends to minimize termination time during service calls.

Is the 198799Z different from the 198799Z/U?
No, these part numbers refer to the same Resideo outdoor or supply sensor; the "U" suffix typically denotes "universal" packaging for trade distribution.

Can this be used for return air or water sensing?
Yes, while commonly used for outdoor reset or supply headers, the 3/8-inch probe can be utilized as a return sensor if the control logic supports NTC thermistor input.

What controllers are compatible with this sensor?
It is specifically designed for use with the AQ475, AQ675, and AQ775 panels, along with various SOLA-based hydronic controllers.

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.