
Carbon Dioxide (CO2) Sensors
C7262 Carbon Dioxide (CO2)/Temperature Sensors
The C7262 Sensor is a stand-alone carbon dioxide (CO2) and 
temperature sensor for use in determining ventilation necessity 
with HVAC controllers. The C7262 measures the CO2 concentration 
and temperature to control the amount of fresh outdoor air 
supplied to maintain acceptable levels of CO2 in the space.
• Used for CO
• Integral 20K ohm NTC temperature output.
• Models available with LCD that provides CO2 ppm level.
• Non-Dispersion-Infrared (NDIR) technology used to measure carbon 
dioxide gas.
• Device provides voltage or current output based on CO
• Models available with SPST relay output.
• Automatic Background Cal bration (ABC) algorithm based on longterm evaluation reduces required typical zero-drift check 
maintenance.
Description: Carbon Dioxide and Temperature Sensor, 
Non-dispersive infrared
Carbon Dioxide Range: 0 to 2000 ppm, adjustable 
Analog Current Output: 0/2 - 10 Vdc or 0/4 - 20 mA selectable, 
w/ one relay output
Contact Ratings: 1 A @ 50 Vac/24 Vdc 
Relay Output: One: Normally Open SPST
Dimensions, Approximate
Product Number Display Mounting
C7262A1008/U Yes Wall mount 4 9/16 in. high x 3 in. wide x 7/8 in. deep 116 mm high x 76 mm wide x 22 mm deep Honeywell Logo
C7262A1016/U No Wall mount 4 9/16 in. high x 3 in. wide x 7/8 in. deep 116 mm high x 76 mm wide x 22 mm deep Honeywell Logo
Voltag e: 24 Vac/dc ±20%, 
Frequency: 50 Hz; 60 Hz 
Response Time: 1 minute 
Sensor Type: Non-dispersive Infrared (NDIR) 
Temperature Sensor Range: 50 F to 100 F 
Operating Temperature Range: 32 F to 122 F (0 C to 50 C)  
Accuracy:  (± (30 ppm + 2% of reading)) 
 based ventilation control.
2
Includes(inch) (mm)
 levels.
2
      Commercial 
C7632 Carbon Dioxide (CO2) Sensors
The Carbon Dioxide (CO2) Sensors offer a fixed 0-2000ppm and 
fixed 0-10Vdc output. No adjustments are necessary. Like the 
C7232 sensors, these are for use in determining ventilation 
necessity with HVAC controllers. The sensor measures the CO2 
concentration in the ventilated space or duct. The sensors are 
used in ventilation and air conditioning systems to control the 
amount of fresh outdoor air supplied to maintain acceptable levels 
of CO2 in the space.
• Non-Dispersion-Infrared (NDIR) technology used to 
measure carbon dioxide gas 
• Gold-plated sensor provides long-term calibration stability 
• Fixed 0-2000ppm, fixed 0-10Vdc output 
• Used for CO2 based ventilation control (Demand Control Ventilation (DCV))  
• Automatic Background Cal bration (ABC) algorithm based on long-term 
evaluation reduces required typical zero-drift check maintenance
Description: Carbon Dioxide Sensor, Non-dispersive Infrared (NDIR), 
Wall Mount, Honeywell Logo
Carbon Dioxide Range: 0 to 2000 ppm, fixed 
Analog Current Output: 0-10Vdc fixed 
Electrical Connections: Terminal block 
Relay Output: None
Dimensions, Approximate
Product Number Display Mounting
C7632A1004/U No Wall mount 4 1/8 in high x 3 7/8 in. wide x 1 1/16 in. deep 104 mm high x 99 mm high x 27 mm deep Honeywell Logo
C7632B1002/U No Duct mount 5 5/8 in. high x 3 5/16 in. wide x 1 13/16 in. deep 
x plus 8 in. long sensing tube
Voltag e: 24 Vac (±20%) 
Frequency: 50 Hz; 60 Hz 
Response Time: 1 minute 
Sensor Type: Non-dispersive Infrared (NDIR) 
Operating Temperature Range: 32 F to 122 F (0 C to 50 C)  
Accuracy:  (5% full scale) 
Includes(inch) (mm)
142 mm high x 84 mm wide x 87 mm deep 
x plus 203 mm sensing tube
Honeywell Logo
Components
70-6910 447