Day Night CO2 Monitor & Controller for Greenhouses, Grow Rooms

Day Night CO2 Monitor & Controller for Greenhouses - CO2Meter
Regular price $311.64 Sale price

Compare at $379.69

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The Day Night CO2 Monitor and Controller can be used in greenhouses, grow rooms, hydroponics rooms, and other places where elevated carbon dioxide levels are used to maximize plant growth and productivity.


  • MAXIMIZE YIELDS: maximize yields by +20%! 
  • ACCURATE and EASY TO USE: CO2 Generator Control 
  • INCLUDES PHOTO SENSOR: turns off CO2 at Night
  • PLANT FRIENDLY: no interference to growth cycle
  • USER-CONFIGURABLE: Low Set Point - 800 ppm. High Set Point - 1,500 ppm

Best of all, the CO2 Monitor & Controller is easy to install and use. Simply mount the unit inside your grow room, (all cables and hardware included), plug it into a standard wall jack, plug in your CO2 generator or regulator and it is ready to maximize your plant growing yields.


  • Measurement Range: 0-10,000ppm CO2
  • Sensor Technology: Non-dispersive Infrared (NDIR)
  • Display: Easy to read display with 3-push button functionality 
  • Enclosure: IP54 Enclosure - cover during cleaning, fertilization, or washdown
  • Default settings: Low Set Point - 800 ppm. High Set Point - 1,500 ppm
  • Accuracy: ± 70ppm or ± 5% CO2
  • Relays: One Relay output, Peak Current < 5A@ 250 VAC, SPST. Normally Open
  • Sensor Response Time: < 2 minutes
  • Operating Temperature: 32° to 122° F
  • Calibration: In-situ with fresh air
  • Max Coverage Area: 1,500 sq. ft. with proper air handling
  • Sensor Life Expectancy: 15 years


  • Power: 110VAC Grounded US Plug Only
  • Power Consumption: 2 Watts Maximum
  • Piggyback Cable: Peak Current < 5A @ 250 VAC


  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

Based on 17 reviews
HIGHLY Satisfied

I just wanted to say our team is highly satisfied with the CO2 controller and we will hope to do future business with CO2Meter.

Stephen Capizzi

Not that easy to purchase CO2.

MetroCrops, LLC.
great device

perfect for indoor growing - vertical farm

Max Meraner
The plugs...

Surely good devices, problem is I thought I was buying the EU version: unfortunately the price and the looks of the devices are the same and I ended up ordering the US version by mistake. My bad, I admit it, but since the devices are not cheap and I bought three of them, plus the shipping address clearly said "Italy", it would have been nice to get a mail from your customer service checking in if the devices were really the ones that I needed (which is unlikely, having both US plugs instead of EU ones). Fortunately the device itself works on both US and EU voltage, so I'll just have to purchase six extra adaptors of two different kinds...

Paul Nelms

These are great when they work, I have four of them and two were faulty from new. Warranty is a drawn out blame game irrelevant of the fact that they have turned up faulty. Like I said they are great when they work but the quality is ambiguous and the back service is disgraceful.

"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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