Gas and Specialty Sensors

CO2O Series

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CO2O Series

Outside Air CO2 Sensor CO2O Series

Outside Air CO2 Sensor


The Senva CO2O Outside Air CO2 Sensor Series maximize energy savings by ensuring optimal ventilation. Measuring exterior CO2 levels ensures optimized economizer control. The CO2O series is an outside air sensor with NDIR sensing element and features that include a built-in heater, standard LCD, setpoint relay, menu selectable auto-calibration and provision to offset the reading +/-250ppm. When you need the right product, right now, count on Kele.


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  • Easy to install and maintain
  • ▪ Integrated display and push-button menus for field selectable scale, calibration, and operational modes
  • ▪ Dual 4-20mA and 0-5V/0-10V output (jumper selectable)
  • ▪ Integrated high-reliability solid-state set-point relay is ideal for direct control applications; easy to set up thanks to LCD
  • High reliability reduces call backs
  • ▪ Non-dispersive infrared sensing element (NDIR)
  • ▪ Field replaceable CO2 sensor
  • ▪ 15+ year life expectancy on CO2 sensing element
  • ▪ Industry leading 7-year limited warranty on electronics; NDIR module 3 years
  • High accuracy for improved system performance
  • ▪ Internal heater for reliable outdoor operation
  • ▪ Selectable auto-calibration mode returns sensor to baseline values
  • ▪ ±40ppm, ±3% of reading

Supply Voltage:12-30VDC/24VAC(1), 100mA max.

Analog Outputs:

 :Dual Analog 3-wire 4-20mA and 0-5V/0-10V (2) (jumper)

 :Output scaling 0 - 2000 or 0 - 5000 ppm (selectable)

Digital Setpoint Output:Programmable Solid-state, 1A @ 30VAC/DC, N.O.

Sensor Performance:

 :Type Non-dispersive Infrared (NDIR)

 :Accuracy ±40ppm, ±3% of reading

 :Response time 60 seconds to 90% reading

 :Output update rate 3 seconds

LCD Menu Setup Parameters:

 :SPH, Setpoint, Hi (On point) 500ppm to full-scale (700ppm default)

 :SPL, Setpoint, Lo (Off point) 400ppm to full-scale-50 (600ppm default)

 :SCL, Scaling 0-2000ppm or 0-5000ppm (2000ppm default)

 :ADJ, Adjustment Offset adjustment +/-250ppm (0 default)

 :CAL, Calibration mode Automatic mode ON or OFF (default=ON)

 :RUN, Run mode Displays CO2 in ppm

Operating Environment:

 :Temperature 32 to 122℉ (0 to 50℃)

 :Humidity 0-95% non-condensing


 :Material Polycarbonate; aluminum tube

 :Dimensions 3.7″h x 3.7″w x 2.24″d

Warranty: 7 years on electronics, 3 years on CO2