Best Co2 Controller For Grow Room: Compare 10 Controllers

#1 · Best Overall

1. DANOPLUS KB0297

• Weight: 12.8 oz
• Dimensions: 19.69"D x 6.22"W x 4.17"H

Best for: Mode-switching greenhouse automation.

Why it ranks #1: Plant and Human modes automate enrichment or ventilation, and its 15-foot NDIR probe is specified at ±50 ppm or ±5% accuracy.

DANOPLUS pairs Plant and Human automation modes with a 15-foot NDIR probe, enabling a grower to switch between enriching crops and ventilating when CO2 rises. Its LCD trend display and audible alarm add ways to follow changing readings and notice conditions that need attention.

In Plant mode, the controller starts a CO2 generator when readings fall below the target; Human mode turns on ventilation when levels rise. The 15-foot probe gives flexibility in sensor placement, while the dual-channel NDIR sensor updates readings every second across a 0–5,000 ppm range. The LCD trend display and audible alarm support monitoring without relying only on a momentary reading. This combination suits rooms that need both enrichment and air-clearing workflows.

Skip it if you want independently programmed regulator and fan outlets; the AC Infinity AC-CTC7 lists two independently programmed outlets.

The DANOPLUS KB0297 suits growers who want selectable crop-enrichment or ventilation automation, plus remote readings and alerts. Its 15-foot probe helps with placement, but buyers seeking two independently programmed outlets should check that requirement first.

Listed on Amazon as: CO2 Controller, 0-5000PPM Carbon Dioxide Controller with Human/Plant Mode, 15ft NDIR Probe, LCD Trend Display, Audible Alarm, Day&Night Relay, CO2 Monitor for Greenhouse, Grow Rooms

#2 · Best Light-Sensing Control

2. Inkbird ICC-510

• Weight: 1.3 lb

Best for: Dual-output grow tent control.

Why it ranks #2: Dual outputs connect CO2 equipment and ventilation, while the light sensor adjusts CO2 output based on light intensity.

Inkbird’s dual-output design connects CO2 equipment and an inline exhaust fan at the same time, bringing enrichment and ventilation into one controller. Its light sensor also adjusts CO2 output according to light intensity, making it a fit for growers who want day-aware control rather than a single-output meter.

The two outputs let a grower connect CO2 delivery and ventilation simultaneously, while the light sensor adjusts output based on light intensity. That pairing supports a workflow in which enrichment and airflow are managed from one controller and CO2 output responds to lighting conditions. The 100–240V AC input suits a range of voltage environments. The supplied details identify compatibility with a CO2 regulator and inline exhaust fan, but do not specify a remote probe or trend display.

Skip it if you need a documented remote probe or trend chart; the Autopilot APC8200 lists both for room readings and analysis.

Choose the Inkbird ICC-510 if you want one controller to connect a regulator and inline exhaust fan, with light-responsive CO2 output. Its listed strengths suit a grow tent or greenhouse; consider another model if remote sensing is essential.

Listed on Amazon as: 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

#3 · Best Programmable Outlets

3. AC Infinity AC-CTC7

Best for: Programmable dual-outlet setup.

Why it ranks #3: Two outlets can independently program a regulator and exhaust fan, with precision cycles, night scheduling, and environmental data tracking.

AC Infinity provides two outlets that can independently power and program a CO2 regulator and exhaust fan, enabling coordinated control from one smart controller. Custom CO2 and fan programming can alternate in response to carbon dioxide levels, while night scheduling and environmental data tracking add options for managing a grow-space routine.

Independent outlet programming allows a regulator and exhaust fan to be managed separately, while custom CO2 and fan programs can alternate in response to carbon dioxide levels. Night scheduling offers another way to shape operation around the dark period, and environmental data tracking provides a record of conditions. The advanced sensor measures the grow-space climate. This combination suits growers seeking automation beyond a basic meter, though the supplied details do not give a remote sensor cable length or specific measurement range.

Skip it if you need a specified remote probe cable for sensor placement; the Autopilot APC8200 includes a 15-foot remote sensor cable.

The AC-CTC7 fits growers who want separately programmed regulator and fan outlets, night scheduling, and environmental tracking in one setup. Check whether its listed sensor arrangement fits your room, since a probe cable length is not specified.

Listed on Amazon as: AC Infinity CO2 Controller, Smart Outlet Carbon Dioxide Monitor

#4 · Best Trend Tracking

4. Autopilot APC8200

• Weight: 2.3 lb
• Dimensions: 7.4 x 9.6 x 3.4 in

Best for: Trend analysis for grow rooms.

Why it ranks #4: A remote sensor with a 15-foot cable and photocell pairs with customizable set points and trend charts spanning minutes to weeks.

Autopilot’s trend chart records CO2 levels by minute, hour, day, and week, enabling growers to examine room patterns rather than rely on a single reading. A remote sensor with a 15-foot cable and photocell adds placement flexibility and light-aware control to that record-keeping approach.

The customizable set point and ppm deadband give growers flexibility in setting how the controller responds around a target. Its remote NDIR sensor can be placed where readings are useful in the room, with the 15-foot cable extending placement options; the photocell adds light sensing. Trend-chart zoom levels and minute-to-week records help trace CO2 distribution over different periods, making this a practical choice for growers who want to inspect changes and refine settings over time.

Skip it if you need two independently programmed outlets; the AC Infinity AC-CTC7 specifies separate outlet programming for regulators and exhaust fans.

Choose the APC8200 for a grow room where historical CO2 patterns, adjustable control thresholds, and remote sensing matter. The charting is its clearest fit; growers prioritizing separately programmed fan and regulator outlets should weigh that boundary.

Listed on Amazon as: Autopilot CO2 Monitor & Controller w/15' Remote Sensor

#5

5. DANOPLUS DP-419

• Weight: 1.5 lb
• Dimensions: 4.92"L x 4.33"W x 1.37"H

Best for: Knob-set dual outlet control.

Why it ranks #5: Its two independently programmed outlets control CO2 equipment and exhaust fans, with high and low limits set using two knobs.

DANOPLUS uses two knobs to set high and low CO2 thresholds, enabling a straightforward way to configure when its independently controlled outlets activate. Those outlets can operate CO2 equipment and exhaust fans automatically, while the NDIR sensor and display chart support monitoring conditions in a grow room.

The two smart outlets are independently programmed to control a regulator or CO2 equipment and exhaust fans according to preset values. High and low threshold knobs provide a direct adjustment workflow, rather than relying on a menu-based setup. Its NDIR sensor measures CO2, and the display includes a CO2 chart, temperature, and relative humidity, giving growers several readings to consult while tuning the thresholds. The supplied facts also list a sensor and mounting screws in the package.

Skip it if you want specified day/night automation and a remote sensor cable; the TEKCOPLUS TK297PLUS lists both photo-sensor control and a probe cable.

This DANOPLUS controller suits growers who prefer knob-set thresholds and independent outlets for enrichment and ventilation. Its display adds temperature and humidity context; consider the TEKCOPLUS TK297PLUS if listed photo-sensor control is a priority.

Listed on Amazon as: 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

#6

6. Gain Express AQM-419

Best for: Triple-reading dual-outlet control.

Why it ranks #6: Dual outlets independently control fans and CO2 devices in Plant Mode, and its display measures CO2 from 0 to 5,000 ppm plus temperature and humidity.

Gain Express combines dual-output control with CO2, temperature, and humidity measurements, enabling a grower to manage connected CO2 equipment and fans while viewing several room conditions. Its stated 0–5,000 ppm range, backlit display, and automatic day/night detection add useful monitoring and operating context.

The dual outputs support independent programming of CO2 equipment and fans in Plant Mode, bringing enrichment and ventilation into one controller. Its low-drift, dual-channel NDIR sensor measures CO2 across 0–5,000 ppm, while the display also shows temperature and humidity. A green backlight makes readings visible on the screen, and automatic day/night detection adds light-aware operation. Together, these features suit growers who want monitoring and outlet control in one unit; the supplied details do not specify a remote probe cable length.

Skip it if you need a documented remote probe cable for sensor placement; the DANOPLUS KB0297 includes a 15-foot NDIR probe.

The Gain Express AQM-419_US fits growers seeking dual outlet control alongside CO2, temperature, and humidity readings with day/night detection. Its listed range supports clear monitoring; consider probe placement needs because a cable length is not provided.

Listed on Amazon as: CO2 Controller Carbon Dioxide Monitor CO2 Smart Sensor Dual Outlets Fit with CO2 Regulators and Fans, Two Plug C02 Control for Grow Room, Grow Tent, Greenhouse

#7

7. JuviPerpric IG-419US

• Weight: 0.94 kg

Best for: Large-screen dual-outlet monitoring.

Why it ranks #7: Two intelligent outlets can independently program the fan and CO2 generator, and its monitor measures CO2, temperature, and humidity.

JuviPerpric combines two independently programmable outlets with a large-screen display, enabling growers to automate a CO2 generator and fan while viewing room conditions. Its three-in-one monitoring measures carbon dioxide, temperature, and humidity, adding environmental context to the outlet-control workflow.

The two intelligent outlets can be programmed independently so a fan and CO2 generator respond to preset values, supporting both ventilation and enrichment from one unit. The three-in-one monitor measures CO2, temperature, and humidity, while the large-screen display makes those readings available at a glance. That combination fits growers who want control and environmental readings together. The supplied details do not provide a probe length, a CO2 measurement range, or a charting function, so those are not established features here.

Skip it if you need a documented 0–5,000 ppm range and remote NDIR probe; the DANOPLUS KB0297 lists both along with its 15-foot probe.

The JuviPerpric IG-419US_FBA is a fit for growers who want dual-outlet automation and CO2, temperature, and humidity readings on a large screen. Buyers needing a stated range or probe length should prioritize those specifications instead.

Listed on Amazon as: CO2 Controller, Carbon Dioxide Controller Dual Outlets, Two-Plug System CO2 Sensor with Large Screen Display CO2 Monitor CO2 Controller for Grow Room and Grow Tent

#8

8. briidea HX-182

Best for: Scheduled daylight grow cycles.

Why it ranks #8: Its photocell can restrict CO2 operation to daylight, and six standalone programs support time-based control across different periods.

briidea offers six standalone time-based programs, enabling growers to set different CO2 schedules for periods such as morning, midday, and evening. Light-sensing mode runs CO2 only in daylight, while Off mode continues monitoring with the load off, giving the controller distinct operating choices.

The six independent programs let growers assign start times to separate periods, which supports a schedule that varies through the day. Light-sensing mode turns CO2 off automatically in darkness, while Off mode keeps monitoring the environment with the load completely off. A remote sensor and photocell are listed, bringing sensing and day/night control into the same unit. The supplied facts do not specify the CO2 measurement range or outlet count, so confirm those requirements against the listed features before choosing.

Skip it if you need a stated measurement range and dual outlets; the Gain Express AQM-419_US lists 0–5,000 ppm measurement and dual-output control.

The briidea HX-182 suits growers who want multiple scheduled periods, daylight-aware enrichment, and monitoring while the load is off. Its program flexibility is clear, but buyers requiring a stated range or outlet count should check those details.

Listed on Amazon as: briidea CO2 Monitor and Controller Newest CO2 Controller with Remote Sensor, Photocell for Day/Night Control, Programmable Function to Save CO2 for Grow Room Greenhouse

#9 · Longest Listed Probe

9. Titan Controls Atlas 1

• Weight: 2.85 lb
• Dimensions: 12 x 8.7 x 3.8 in

Best for: Long-cable remote sensor control.

Why it ranks #9: The 25-foot remote sensor is the longest listed here, with an adjustable set point, elevation setting, self-calibration, and photocell.

Titan Controls includes a 25-foot remote sensor, enabling CO2 readings from a point farther from the controller than the shorter cables listed on some alternatives. Adjustable set point and elevation levels, self-calibration, and a photocell add control and sensing options for daytime grow-room operation.

The 25-foot sensor cable gives flexibility in locating the measurement point, while the adjustable set point lets growers choose a CO2 target. Elevation adjustment and built-in self-calibration are additional listed functions for configuring and maintaining the controller. An integrated photocell enables operation during daytime hours only, aligning its CO2 control with the light period. The product description also states 15 A. The supplied facts do not specify dual outlets or a CO2 measurement range, so its strongest case is remote, photo-aware control.

Skip it if you need independently programmed fan and regulator outlets; the AC Infinity AC-CTC7 specifically lists two separately programmed outlets.

The Atlas 1 suits growers who value a long remote sensor cable, adjustable set point, and photocell-based daytime operation. Its listed control features fit a focused setup; prioritize another controller if separate fan and regulator outlets are required.

Listed on Amazon as: Titan Controls Atlas 1, Remote CO2 Monitor/Controller for Grow Rooms

#10

10. TEKCOPLUS TK297PLUS

• Dimensions: 1.97"D x 1.57"W x 2.36"H

Best for: Daylight-aware CO2 sensing.

Why it ranks #10: Its 0–5,000 ppm NDIR sensor and day-night photocell suit plant monitoring, but listed control and outlet details are less extensive.

TEKCOPLUS uses a built-in photo sensor to shut off CO2 enrichment in darkness, enabling daylight-only operation for plants. Its NDIR sensor measures from 0 to 5,000 ppm, and the remote sensor probe cable supports placing the measurement point apart from the controller.

Day/night detection links enrichment to light conditions, helping avoid running CO2 when the photo sensor detects darkness. The low-drift NDIR sensor covers 0–5,000 ppm and is described as not needing constant recalibration, supporting ongoing monitoring with less frequent sensor attention. A remote probe cable allows the sensing point to be placed away from the controller, while the compact listed dimensions can suit a setup with limited controller space. The supplied facts do not specify dual outlets.

Skip it if you need separately programmed regulator and exhaust-fan outlets; the AC Infinity AC-CTC7 lists two independent outlets.

Choose the TK297PLUS if daylight-only CO2 operation, remote sensing, and a stated 0–5,000 ppm range match your grow room. Its supplied features emphasize sensing and photo control, not independent dual-outlet programming.

Listed on Amazon as: CO2 Controller Carbon Dioxide Controller Air Quality Monitor CO2 Meter with Day and Night Control Relay Function, NDIR Sensor Probe Cable, CO2 Detector for Plant, Grow Room, Green House, Garden, Home