TR21-A Honeywell Temperature Wall Module

Honeywell Temperature Wall Module, 4 to 20 mA, 0 - 10 VDC, 10 kOhm NTC Thermistor Sensing Element, 55 to 85 deg F Temperature Settings, Junction Box Mounting, Plastic, White, 3 in Length, 4-13/16 in Height, 7/8 in Width, 45 to 99 deg F Operating, -40 to 150 deg F Storage, For Use With: Honeywell Excel 600, 500, 100 and 80 Controllers, Excel 10 W7750, W7751A, W7752 and W7753 and W7761 Controllers and Spyder Unitary Controllers