TechGrow T-Micro CO2 Controller – 300-2000 ppm and 1,000 W switching (sensor not included)

TechGrow T-Micro CO2 Controller

🔴 Read this before buying: the T-Micro does NOT include the CO2 sensor. It requires the TechGrow S-2 sensor, which is sold separately and is not distributed by Hortitec. Without that sensor, the controller cannot measure anything and is useless. We put it in the title and repeat it here because we would rather lose the sale than sell you equipment that you will not be able to use.

If you already have an S-2, or can get one through another channel, the T-Micro is a solid and very straightforward controller to use.

Specifications

• Control range: 300-2000 ppm
• Adjustable hysteresis: 20-200 ppm (50 ppm recommended)
• Reading frequency: 1 reading per second
• Switching: 1,000 W (maximum 4 A)
• Calibration with outdoor air
• Broken wire detection
• Power outage memory
• Includes 5 m UTP cable
• Sensor: TechGrow S-2, NOT included and not distributed by Hortitec

Why hysteresis matters

Hysteresis is the margin between the point at which the controller opens the supply and the point at which it closes it. With too narrow a margin, the equipment switches constantly and puts strain on the generator or solenoid valve. With 50 ppm, which is the recommended value, the supply operates in clean and stable cycles.

Broken wire detection and memory

Two details that are appreciated in real installations: if the sensor cable is cut or disconnected, the equipment detects it instead of continuing to dose blindly; and if the power goes out, the power outage memory restores the configuration upon startup.

⚠️ Safety: CO2 is not harmless

CO2 at high concentrations is dangerous for people. Normal air is around 420 ppm; an enriched room operates at 1,200-1,500 ppm and above about 5,000 ppm there is a real health risk. Never enter a room with active dosing without ventilating first. Cut off the supply, extract for a few minutes, and enter afterward. In closed rooms, install an independent CO2 detector.

What it can control

With 1,000 W and 4 A maximum, it easily switches the solenoid valve of a compressed CO2 tank or the control of a propane generator. Always check the power consumption of the equipment you are going to connect before wiring it.

Is a controller worth it for you?

• Less than 2 m³: no. Passive consumable and ready.
• 2-10 m³: still not worth it.
• 10-30 m³: yes, with compressed tank, which does not add heat.
• More than 30 m³ with controlled climate: controller + propane combustion.

At GrowIndustry we only work with proven quality products and trusted brands.

Every item goes through a check before shipping to make sure it arrives in perfect condition and ready to use.

Your satisfaction is our priority.

1. Before installing anything, get the TechGrow S-2 sensor: without it, the controller cannot measure.
2. Connect the sensor to the controller using the included 5 m UTP cable and place it at canopy height.
3. Calibrate the equipment with outside air following the manufacturer's procedure.
4. Connect the generator or solenoid valve to the controller, without exceeding 1,000 W or 4 A.
5. Set the ppm target and adjust the hysteresis to about 50 ppm so that the supply operates in clean cycles.
6. Stop dosing and ventilate for a few minutes before entering the room.