Top 10 Best co2 controller in 2026

Last Updated - 6/6/2026

🏆Best Choice

Inkbird

Inkbird ITC-308 Digital Temperature Controller 2-Stage Outlet Thermostat Heating and Cooling Mode Carboy Homebrew Fermenter Greenhouse Terrarium 110V 10A 1100W

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•【Easy to use】 Supports °C/°F display.
•【Dual relay】able to power refrigeration and heating equipment as conditions change.
•【Dual Display Window】Displays measured temperature and set temperature at the same time.
•【Buzzer Alarm】High and low temperature alarms are available when the temperature is over or the sensor experiences a malfunction.
•【Safety】Maximum output load: 1100 W(110 V). Customize temperature and compressor delay, protecting your refrigeration/heating equipment.

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$35.00

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AC Infinity

AC Infinity Controller AI+ with CO2 Sensor Bundle – AI-Powered Learning, CO2 Data Tracking for Gardens & Grow Tents, Temp, Humidity, & VPD Monitoring for Dynamic Level Adjusting, Bluetooth & WiFi App

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Revolutionary AI-powered controller with CO2 sensor, actively learns and adapts to its environment to automate equipment that will precisely regulate carbon dioxide levels.
•Let AI analyze climate patterns and anticipate spikes, to program devices to dynamically output the exact percentage needed to maintain an optimal environment.
•Sensor enables smart CO2 programming dynamically adjust carbon dioxide levels, optimizing FAE (fresh air exchange) and setting minimum intake speeds for maximum efficiency based on PPM(Points Per Million).
•Control your setup from anywhere via WIFI with our app, featuring real-time AI insights, guides, alerts, charts, and the ability to chat with our AI bot about your grow.
•Mix and match up to 32 devices from the largest platform of smart fans, grow lights, humidifiers, heaters, A/Cs, and grow lights & outlet devices from other brands.

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$199.00

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VIVOSUN

VIVOSUN Hydroponics CO2 Regulator Emitter System with Solenoid Valve Flowmeter for Grow Room Grow Tent Garden

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Durable Material: Long-lasting durable brass components will function for many years without rusting
•Specifications: 1.58" high pressure gauge: 0-4000 PSI; Flowmeter: 0-15 SCFH; Inlet connection: cga-320
•Application: Perfect for enhancing the amount of available carbon dioxide and accelerating plant growth rates and yields by up to 40% in indoor hydroponics, grow rooms, grow tents and warm houses
•Components: A precision regulator, flow gauge, and industrial solenoid valve, 5 meters free plastic dispensing tubing and USA standard 3-prong plug (hose tail to suit 4.2 mm hose diameter)
•Multiple Options: This CO2 regulator will allow you to maintain ideal CO2 levels for optimal growth

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$43.99

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AC Infinity

AC Infinity CO2 + Light Sensor, Exclusively Assists Controller AI+ Dynamically to Learn and Manage Equipment; CO2 Data Tracking Enables Smart Fan Programming for Optimized FAE, Day & Night Scheduling

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•This sensor is designed specifically for AC Infinity AI controllers to help monitor CO2 levels through adaptive automated learning.
•CO2 sensor pairs with AI Controllers and our Wi-Fi enabled app to precisely control and disperse carbon dioxide within grow spaces based on the most beneficial light cycle.
•Custom CO2 and fan programming dynamically alternate to activate in response to carbon dioxide levels and optimize FAE (Fresh Air Exchange).
•Additional programming includes day & night scheduling, precision cycling, and environmental data tracking.
•Smart programming can set minimum intake speed to improve efficiency of plant environment based on PPM.

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$49.99

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Inkbird

Inkbird ICC-510 CO2 Controller CO2 Meter Dual Plug Carbon Dioxide Controller Fit with CO2 Regulator and Inline Exhaust Fan for Grow Tent, Grow Room, Greenhouse, Grower

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Dual Output Design: Connects to CO₂ equipment and ventilation system simultaneously, maintaining ideal CO2 levels for optimal plant growth.
•Intelligent Light Sensor: Automatically adjusts CO₂ output based on light intensity, promoting energy efficiency and healthy plant development.
•Universal Power Supply: 100-240V AC input, suitable for use in various voltage environments worldwide.
•Precise CO₂ Control: Helps regulate CO2 concentration, enhancing photosynthesis and keeping plants fresh and thriving.
•Versatile Application: Ideal for greenhouse cultivation, facilitating plant growth and productivity.

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$130.99

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AC Infinity

AC Infinity CO2 Controller, Smart Outlet Carbon Dioxide Monitor, Two-Plug System Best Fit with CO2 Regulators and Inline Exhaust Fans, Adjusts CO2 for Grow Tents, Grow Rooms, Greenhouses

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•A smart outlet controller to optimize your environment for growing by managing CO2 output and removal.
•Supports and independently programs CO2 regulators and exhaust fans for use in indoor grow settings.
•Custom CO2 and fan programming dynamically alternate to activate in response to carbon dioxide levels.
•Other programming includes precision cycles, night scheduling, and environmental data tracking.
•Advanced sensor precisely measures your grow space climate to ensure accurate readings.

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$129.00

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Autopilot

Autopilot CO2 Monitor & Controller w/15' Remote Sensor

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Fully customizable ppm deadband and CO2 set point allow flexibility in programming
•Trend chart records CO2 levels per minute, hour, day and week for accurate analysis of CO2 distribution
•Adjustable trend chart zoom levels let you trace your ppm levels
•Remote CO2 sensor probe w/Photocell & 15' data cable lets you take readings from proper grow room locations
•2-channel low drift ndir sensor precisely reads CO2 ppm levels

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$202.41

$242.77

-17%

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DANOPLUS

CO2 Controller Dual Outlets Carbon Dioxide Controller for Grow Room, Two Smart Plugs Automatically Control Regulators and Fans, NDIR Sensor and Display CO2 Chart, Temp, RH

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•✅【Dual Outlets Control】DANOPLUS CO2 Controller is equipped with TWO smart outlets, Dual outlets are independently programmed and control, it will turn on CO2 Equipment or Exhaust Fans automatically according to your preset values, optimize CO2 environment for grow room.
•✅【NO Complicated Setup!!!】Digital CO2 Controller is designed with 2 knobs: BORDER HI and BORDER LOW, you can simply rotate the knobs to set the high/low value to control the CO2 regulators and Exhaust Fans. No complex calculations for Zone and Center value compare to others!
•✅【Dual-beam NDIR CO2 Sensor】DANOPLUS CO2 controller is equipped with a dual-beam low-drift NDIR CO2 sensor for accurate CO2 readings (±50ppm), the sensor is able to AUTO detect day and night in Plant Mode and display CO2/Temp/RH readings also.
•✅【3 in 1 CO2 Controller】The CO2 Monitor and Controller has a large LCD Screen displaying CO2 chart, CO2 Reading, Temperature, Humidity, supports independently programmed and automatically control the CO2 level in your grow tent, Grow room, Home, etc.
•✅【Multi-Functional CO2 Controller】The carbon dioxide controller is equipped with Plant Mode and Human Mode(Automatically Control), Buzzer Alarm, Altitude Adjustable, Calibration Function, MAX/MIN reading, CO2 Chart setting, and comes with sensor of 15 FEET(450 cm) long cable

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$109.99

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Elaphodus

CO2 Controller for Plant, Dual-Plug System for Direct Connection to CO2 Regulator and Exhaust Fans.Suitable for Greenhouses, Grow Room, and Plant Factory

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•【Precise Measurement】Dual-channel, low-drift NDIR CO2 sensor for long term stability.Boosts plant photosynthetic efficiency.
•【dual-outputmodel】Enables independent control of pressure valves & exhaust fans with auto CO2 adjustment for ideal plant growth.
•【Energy Saving】Features light-sensing auto-switching that deactivates the CO2 regulator during nighttime hours, preventing unnecessary gas consumption.
•【Easy Setup】Rotate the knob to set high/low CO2 limits—no complex calculations. Supports Plant Mode and Human Mode.
•【Multi-function】LED LCD screen displays CO2 concentration, humidity, and temperature.Traceable chart with adjustable time span;
•【Alarm Alert】Alarm activates if CO2 exceeds set limit. Adjustable high limit.

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$104.40

$109.90

-5%

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Inkbird

Inkbird ICC-500T CO2 Controller CO2 Meter Carbon Dioxide Controller for Grow Room and CO2 Generator, with CO2 Sensor for Home Grower (CO2 Controller + S01 Sensor)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•【Double Outlets】Pls plug CO2 regulator or generator into WORK1, exhaust fan into WORK2
•【Programmable】Controls the CO2(ppm) within the desired range and supports calibration and alarms
•【Plug-n-play】The CO2 controller will turn on/off the device when reaches the desired CO2(ppm) level
•【Digital Display】Both the measured CO2 and the desired CO2 are (ppm)displayed on the CO2 Controller
•【Reliable】CE&FCC certificated. S01 Sensor is suitable for home growing and HVAC Equipment

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$148.99

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Our team evaluates this data alongside genuine user feedback, merging AI analysis with human insights to provide you with real-time, highly-rated recommendations that empower your decision-making with clarity and confidence.