Commercial Instruments CO2 Monitor & Controller

The Commercial Instruments AWG610 is a simple, accurate digital CO₂ monitor and controller designed for grow rooms and controlled environments. It continuously measures CO₂ (PPM) and can automatically control a connected CO₂ device to maintain your target level. A large, easy-to-read LCD screen displays CO₂ concentration, temperature, and humidity, with 1 PPM display resolution for precise monitoring.

The AWG610 includes a remote sensor unit (with hook for hanging at canopy height) and supports both Plant Mode and Human Mode, making it useful for cultivation control or general CO₂ level monitoring with alarms.

Key Features

Low-drift NDIR CO₂ sensor

High precision temperature & humidity sensor

Large LCD display showing CO₂, temperature, and humidity

Plant Mode / Human Mode selection

Built-in Day/Night photocell sensor (Plant Mode)

Adjustable CO₂ setpoint

Adjustable deadband control

CO₂ MAX/MIN memory display + reset

Alarm + relay trigger in Human Mode

Manual outdoor calibration function

Plant Mode (Grow Room Control)

In Plant Mode, the AWG610 uses its built-in photocell to detect day vs night.
This allows it to automatically stop CO₂ output during darkness (when plants aren’t using added CO₂ efficiently), and resume control when light is detected.

Human Mode (Alarm & Safety Monitoring)

In Human Mode, the unit provides CO₂ alarms with adjustable thresholds:

AL1 default: 800 PPM (adjustable 800–2500 PPM, steps of 100 PPM)

AL2 default: 2600 PPM (adjustable 2600–5000 PPM, steps of 100 PPM)

When CO₂ rises above AL1, the buzzer sounds intermittently and the relay is triggered. If CO₂ rises above AL2, the alarm becomes more urgent.

⚠️ Disclaimer: This device is not intended for workplace hazard CO₂ monitoring or medical/life-sustaining use.

Setpoint & Deadband Control…

You can set a target CO₂ level using SETPOINT, and adjust the control range using DEADBAND.

Deadband range: 50–500 PPM (each press changes by 50 PPM)
Example from manual:
If Setpoint = 1000 PPM and Deadband = 200 PPM, output starts below 800 PPM.

Commercial Instruments CO₂ Controller Specifications:

CO₂ Measurement Range: 0–9999 PPM

Accuracy (0–3000 PPM): ±50 PPM or ±5% of reading (whichever is greater)

Repeatability: 20 PPM at 400 PPM

Resolution: 1 PPM

Response time: < 1 minute

Warm-up time: < 30 seconds

Temp dependence: ±0.1% of reading per °C or ±2 PPM per °C (referenced to 25°C)

Pressure dependence: 0.13% of reading per mmHg (corrected by user altitude input)

Temperature Measurement

Operating temp: 0°C to 50°C (32°F to 122°F)

Resolution: 0.1°C (0.1°F)

Accuracy: ±0.5°C (±1°F)

Response time: < 10 minutes

Humidity Measurement

Range: 0–99% RH

Accuracy: ±3%

Resolution: 0.1%

Power & Output (ZA 3-pin plugs)

Power input: AC 100–300 VAC

Piggyback socket load: 10A @ 250VAC

Physical

Sensor unit size: 63 × 99 × 28 mm

Control unit size: 164 × 147 × 47 mm

Weight: 1200 g (includes cables)

Calibration

Calibration is done by taking the sensor unit outdoors, powering it via 5V USB-C, and holding CALI for 3 seconds. Calibration takes about 15 minutes.