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The CT9210 is a two piece controller that includes a wall mount CO2 sensor and a plug-in 120 VAC switch that powers the sensor and can activate any 120V device based on the CO2 level in the space. Ideal for activating CO2 generators or CO2 canister valve release.



  • Control of CO2 generators used in greenhouse applications
  • Ideal for hobbyist applications

Key Features

  • Controls CO2 to 1450 ppm with a 50 ppm dead-band. Set point is factory adjustable and can be set to alternative set points at time of order.
  • LED to indicate current CO2 operating range
  • Wall mount CO2 sensor activates a 110VAC (10A) plug in switch
  • 10 ft cord between wall mount sensor and plug-in switch.
  • Easily calibrated in outside air at the press of a button.
  • The plug in 110V switch also powers the sensor.

TR9210 CO2 Control Switch for CO2 Generators

  • Measures: 0-2,000 ppm CO2, Factory adjustable to 10,000 ppm
  • Accuracy: ± 30 ppm + 3% of reading
  • Power: 110V to plug in switch
  • CO2 output: Plug in 110VAC voltage switch