Tongdy Greenhouse CO2 Controller

  • ESTON-08Part Number: ESTON-08
  • CO2 Control for Greenhouse or Glasshouses
  • Plug & Play – Install and Setup in Minutes
  • Built-in Light Sensor Stops CO2 at Night


The Tongdy ESTON-08 Greenhouse Controller with Relay lets you simply and easily control carbon dioxide levels in a greenhouse or glasshouse. The ESTON-08 is extremely simply to use and can be installed in 3 steps:

  • Mount the unit on your greenhouse wall
  • Plug the unit into a grounded 110-220VAC electrical outlet

With its LCD readout and easy-to use interface, you can customize your CO2 levels. By default, the regulator will be turned on whenever the CO2 level drops below 780ppm (double normal CO2 levels, perfect for most plants) and it is daylight. In addition, the Greenhouse controller can be calibrated using normal fresh air to save you money.

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Manual and Brochure

Download ESTON-08 Brochure

Download ESTON-08 Manual



  • ESTON-08 Set UpNon-Dispersive Infrared (NDIR) CO2 sensor (NDIR explained)
  • Sampling Method: Diffusion
  • Range: 0 – 5,000 ppm
  • Accuracy: ± 40 ppm ± 3 % of measured value
  • Life Expectancy: > 15 years
  • LCD displays CO2 levels


Electrical / Mechanical

  • Power Input: 110-220 VAC
  • Output Relay: 110-220 VAC 5A Switching Current
  • Output Relay Control: on at 780ppm, off at 820ppm default
  • Housing: PC/ABS fireproof plastic; protection class: IP30
  • Maintenance Interval: No Maintenance Required
  • Operating Conditions: 32-122°F (0-50°C), 0-99% RH, non-Condensing
  • Standard: CE-Approved


  • 1 Year

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