Tongdy CO2 Transmitter with Display

Tongdy CO2 Transmitter with Display
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  • Real-time Carbon Dioxide Level Transmitter & Monitor
  • 3-Color back lit LCD to Easily Check IAQ
  • 4-20 mA / 0-10 Volt Output
  • Industry-Standard Wall-Mount
  • Power Input: 24VAC/VDC @ 3.5 W Max, 2.8 W Avg.

The Tongdy CO2 Transmitter lets you transmit, control and monitor indoor air quality.

  • Use it to transmit ambient carbon dioxide levels to an HVAC or demand controlled ventilation system.CO2 levels can be sent as industry standard 4-20mA or 0-10V signals back to a control panel.
  • Use it to monitor air quality with its easy-to-read back lit LCD display that quickly changes from green to yellow to red as air quality declines. You can also read the individual air quality readings directly from the display.

With its single-button ease of use and industry-standard 24V power requirements, the Tongdy CO2 Transmitter with Display is perfect for homes, offices, meeting rooms, classrooms, or anywhere monitoring and controlling indoor air quality is important for occupant's comfort.


  • Non-Dispersive Infrared (NDIR)
  • Sampling Method: Diffusion
  • Range: 0 – 5,000 ppm
  • Accuracy: ± 40 ppm ± 3 % of measured value
  • Life Expectancy: > 15 years

    Electrical / Mechanical

    • Dimensions: 130mm (H) × 85mm (W) × 36.5mm (D), 200g
    • Power Input: 24VAC/VDC @ 3.5 W Max, 2.8 W Avg.
    • Outputs: Either 4-20mA or 0-10V set via jumper.
    • Housing: PC/ABS fireproof plastic material; protection class: IP30
    • Maintenance Interval: No Maintenance Required
    • Standard: CE-Approved


      • 1 Year

      Datasheet Data Sheet (pdf)

      Datasheet Manual (pdf)