

Honeywell TR21-A Temperature Sensor
The TR21, TR22, TR23, and TR24 are a family of direct wired wall modules for use with Honeywell Excel 600, 500, 100, and 80 controllers; Excel 10 W7750, W7751A, W7752, and W7753 controllers; W7761 Controller; and Spyder Unitary Controllers. All models have a space temperature sensor. (Please note: a separate sensor does not come with the unit. This product is the module only).
Features
- Models available with user selectable setpoint adjustment dials in Fahrenheit, Celsius and Relative Scales
- Models available with occupied/unoccupied override (bypass) with LED
- Models available with 3-position (auto/0/1) or 5-position (auto/0/1/2/3 speed) fan switch
- LONWORKS network jack on all models except the TR21 and TR21-A models
- Models available with on board humidity sensor, humidity output: 0-10Vdc, 0-5 Vdc, 4-20ma selectable.
Specifications
- Description: 10 K ohm NTC non-linear Temperature Wall Module (for averaging only)
- Application: For use only when averaging multiple sensors
- Sensor Type: Unique 10K ohm non-linear, two 20Ks in parallel
- Color: White
- Mounting: Mounted on a standard 2 x 4 inch junction box or on a 60 mm diameter junction box.
- Operating Humidity Range (% RH): 5 to 95% RH, non-condensing
- Operating Temperature Range (F): 45 F to 99 F
- Dimensions (in.): 4 13/16 in. high x 3 in. wide x 7/8 in. deep
- Used with: Special 10K ohm for use only when averaging multiple sensors, can also be used with T7350, TB8220 Thermostats
- Also Used With: Spyder, Excel 600, 500, 100, 80 and Excel 10, 15 Series Controllers
Pairs well with

Honeywell TR21-A Temperature Sensor
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FAQs
What is the warranty?
All of our products come with a manufacturer warranty. Most of which are 1 year from date of purchase.
Do you take returns?
We absolutely do. You can return any product within 30 days of purchase.
If I decide to order, when will I get my order?
All of our orders ship the same day if placed before 2 PM EST.