Description
The Reznor 210855 is a precision immersion temperature sensor engineered for reliable fluid temperature monitoring in hydronic heating systems and related HVAC applications. Featuring a 10,000 Ohm NTC (Negative Temperature Coefficient) Type III thermistor element, this sensor delivers highly accurate and responsive temperature readings across a broad operating range — making it an ideal replacement or upgrade component for Reznor heating equipment and compatible control systems.
Key Features
- 10,000 Ohm NTC Thermistor — Type III sensing element for accurate, stable temperature measurement
- 4″ immersion probe length for effective fluid contact in pipes and vessels
- 1/2″ NPT threaded adapter for straightforward installation into standard pipe fittings
- Designed for use in hydronic heating, boiler, and fluid temperature sensing applications
- OEM Reznor replacement part — ensures compatibility with Reznor heating systems
Specifications
- Part Number: 210855
- Brand: Reznor
- Sensor Type: NTC Thermistor, Type III
- Resistance: 10,000 Ohm
- Probe Length: 4″
- Connection: 1/2″ NPT Adapter
Application
The Reznor 210855 immersion temperature sensor is suited for monitoring supply, return, or mixed water temperatures in hydronic heating loops. The 1/2″ NPT adapter allows for easy insertion into existing pipe taps or thermowell fittings, while the 4″ probe ensures adequate immersion depth for accurate readings. The Type III NTC thermistor characteristic is widely supported by building automation and HVAC control systems, making this sensor a versatile choice for both OEM replacement and new installations.
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