Description
The Honeywell C7021D2001 is a high-performance NTC Type II immersion temperature sensor engineered for precise monitoring of hot and chilled water systems in commercial and industrial HVAC applications. With a 5-inch insertion depth, this sensor is designed to be installed directly into hydronic piping or wells, delivering accurate, real-time temperature data to building automation and control systems.
Key Features
- NTC Type II thermistor technology for accurate, reliable temperature measurement
- 5″ insertion length for direct immersion into hydronic piping or thermowells
- 10k Ohm resistance rating for compatibility with a wide range of controllers and building automation systems
- Wide operating temperature range of -40°F to 250°F (-40°C to 121°C), suitable for both hot and chilled water applications
- Compatible with hot water heating and chilled water cooling systems
- Designed for integration with Honeywell and other compatible building automation and HVAC control systems
Applications
- Hot water supply and return temperature sensing
- Chilled water supply and return temperature sensing
- Hydronic heating and cooling systems
- Commercial building automation and energy management systems
- Boiler and chiller plant monitoring
Specifications
- Model: C7021D2001
- Sensor Type: NTC Type II Thermistor
- Resistance: 10k Ohm
- Insertion Length: 5 inches
- Temperature Range: -40°F to 250°F (-40°C to 121°C)
- Application: Hot or Chilled Water Immersion
- Brand: Honeywell
The C7021D2001 is a trusted solution for HVAC professionals seeking dependable immersion sensing in demanding hydronic environments. Its robust construction and broad temperature range make it an ideal choice for new installations and system upgrades alike.







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