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The Resideo TR21-A/U is a temperature sensor designed for use with various Honeywell controllers. It operates effectively between 45 degrees Fahrenheit to 99 degrees Fahrenheit. This sensor is compatible with Honeywell Excel 600, 500, 100, and 80 controllers, as well as W7750, W7751A, W7752, W7753, and the W7761 Controller. The TR21-A/U provides precise temperature measurements and is suitable for various applications requiring averaging from multiple sensors.
The TR21-A/U is ideal for direct wired installations and averaging multiple sensor readings. It can be mounted easily and is designed for robust operation in varying temperatures.
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