
C7735 Return Air Sensor
Application: Mount on return duct for backup control of non-zoned 
systems
Dimensions, Approximate: 3 7/8 in. high x 4 1/8 in. wide x 1 1/4 in. deep 
(77 mm x 102 mm x 25 mm). Sensor probe: 3 3/4 in. long (77 mm) 
Product Number Comments Used With
C7735A1000/U Return Air Sensor is also available in kits for 
non-zoned systems
THM5320R1000 Equipment Interface Module; TH6320R1004 or TH5320R1002 
Wireless FocusPRO® Thermostat
C7089 Outdoor Sensor
Temperature Sensors
Mount on return duct for backup control of non-zoned RedLINK™ 
enabled wireless systems. Works with the EIM to maintain safe 
indoor temperatures if power is lost at the wireless thermostat.
• Works with THM5320R1000 Equipment Interface Module to 
maintain safe indoor temperatures if power is lost at the wireless 
thermostat 
• Takes control of the equipment by turning on the blower fan and 
sensing the indoor temperature of the home 
• Controls heating at 62 F and cooling at 82 F 
• Provides homeowners with peace of mind 
• Installs in minutes 
• Includes mounting hardware
Color: Gray 
Operating Temperature Range: 0 F to 200 F (-17.8 C to 93.3 C)  
Mounting: Mounts on return duct
Remote outdoor temperature sensor, when installed, the current 
outdoor temperature is displayed. Also can be used to manage 
dual fuel and lock-out expensive auxiliary heat in heat pump 
applications.
• Mounting clip allows easy sensor positioning on siding or soffit 
• Includes 60 in. leadwires 
• Factory calibrated; no field calibration required 
• Maximum wire run of 200 feet
Controls
Home 
Dimensions, Approximate: 2 1/4 in. x 3/8 in. with 60 in. leadwires
 (57 mm x 10 mm with 1524 mm leadwires.) 
Operating Humidity Range (% RH): 5 to 95% RH, non-condensing
Product Number Description Application Used With
C7089B1000/U Outdoor sensor used to measure 
C7089U1006/U Outdoor Sensor used to measure 
outdoor temperature
the outdoor temperature
Outdoor sensor for Chronotherm IV 
thermostats and TZ-4 Zone Panel
Outdoor sensor for Prestige® IAQ, 
VisionPRO with RedLINK™ and 
VisionPRO IAQ Thermostats
Ambient Temperature Range: -40 F to +128 F (-40 C to +53 C)  
Mounting: Mounting Clip provided and screws provided.
TZ-4 Zone Panel
Prestige® IAQ, VisionPRO® Series Thermostats, 
VisionPRO® IAQ Thermostat
C7189 Remote Indoor Sensor
The Remote Indoor Temperature Sensor is used to sense 
temperature remotely.
• Used to sense temperature if the thermostat is installed in a 
poor temperature sensing location. 
• Small remote temperature sensor to match any room decor. 
• Easy to install and use. 
• Factory calibrated; no field calibration required. 
• Works with a maximum 200 foot wire run.
Application: Remote Indoor Temperature Sensor for 
VisionPRO and VisionPRO IAQ Thermostats
Dimensions, Approximate: 1 1/2 in. wide x 2 1/4 in. high x 3/4 in. deep
(38 mm x 57 mm x 19 mm) 
Color: Premier White® 
Operating Humidity Range (% RH): 5 to 95% RH, non-condensing 
Ambient Temperature Range: 45 F to 88 F (7 C to 32 C)  
Mounting: Mounts directly on wall using mounting screws and anchors 
provided
Prestige® IAQ,
Product Number Description Temperature Setting Range Used With
* C7189U1005/U Remote indoor sensor for remote sensing applications See Thermostats
* TRADELINE models • SUPER TRADELINE models
70-6910 35
Prestige IAQ 
VisionPRO® IAQ Series Thermostats
®, VisionPRO® and