Duct-mounted Carbon Dioxide Sensor
Duct-mounted Carbon Dioxide Sensor
Item # EP-CO2-D

The Honeywell Model EP-CO2-D carbon dioxide sensor measures CO2 concentration in a ventilated space or duct. These CO2 sensors are designed for use in building automation systems, BAS, and HVAC systems to achieve building ventilation control. These easy-to-install wall-mount or duct-mount sensors provide long term CO2 monitoring at a low cost. Each sensor is compact in size and has selectable ranges. They have an analog and relay output, use non-dispersive infrared (NDIR) technology, and feature a unique corrosion-free sensing chamber for accurate, stable CO2 sensing. Models are available for wall and duct-mount applications, and with or without an LCD display.

Features and Benefits
  • Available with LCD to provide sensor readings and status information
  • Non-dispersive infrared technology to measure carbon dioxide gas
  • Gold-plated sensor for long term calibration stability
  • Analog and relay outputs based on CO2 levels
  • Automatic Background Calibration (ABC) algorithm based on long term evaluation to reduce required maintenance
  • 1-year warranty
Product Specifications
3.13” x 3.63” x 3.44” (WHD)
Input Voltage
24VAC/DC +20%; 50/60Hz
6 leadwires, 20-gauge, 6” length
Non-dispersive infrared (NDIR)
Sensor Range
0 to 2000 ppm, adjustable
Operating Temperature
32° to 122° F
Relay Outputs
1, normally open SPST
Timing Response
1 minute
Analog Current Output
0/2 – 10VDC or 0/4 – 20mA selectable with one relay output


5418 Elmwood Ave | Indianapolis IN 46203 | 888-652-9663