TechGrow T-2 Pro CO2 Controller/Regulator/Monitor

The TechGrow T-2 Pro CO2 Controller is the extended version of the T-1 Pro, featuring a built-in climate controller to regulate CO2, temperature, and humidity in one device. With this unique combination, you can dose CO2 during the day and extract excess CO2 and moisture at night, while maintaining the ideal temperature in your grow space.

The T-2 Pro is available in different versions (4.5A, 7A, 14A), suitable for fans up to 10,000 m³/h. The CO2 measurement range is selectable between 300–2000 ppm or 300–10,000 ppm, depending on the connected sensor. Advanced features include dosing delay, timer, automatic counter, 7-day CO2 log, min/max data storage, and smooth, silent fan control thanks to its unique calibration function.

Its robust, splash-proof housing and intuitive single push-and-turn knob make it easy to operate, with a large, clear LCD display.

Note: The T-2 Pro CO2 Controller comes without sensor. Recommended: S-4 sensor (0–2000 ppm).

Key Features

• Measures and regulates CO2, temperature, and humidity 24/7
• Extracts excess CO2 and moisture at night
• Displays min/max values of connected sensors
• Adjustable from 300–2000 ppm or 300–10,000 ppm (sensor required)
• Adjustable dosing delay and timer
• Automatic CO2 dosing counter and 7-day log
• Pulse dosing for controlled CO2 addition
• Built-in calibration for CO2 and temperature
• Display updates every second
• LED indicators for CO2 dosing, light detection, and stable climate
• Individually adjustable setpoints, hysteresis, and alarm values
• Quick menus for a handy overview
• Suitable for fans up to 5000 m³/h (7A) and 10,000 m³/h (14A)
• Fan control: automatic or manual mode
• Separate relays for CO2 and fan
• Settings stored during power failure
• Automatic day/night detection via light sensor
• UTP connection (5 m cable included)
• Compatible with TechGrow Datalogger (DL-1)

Key Functions

• Controls: CO2, humidity, temperature
• Measures/displays: CO2, humidity, temperature
• CO2 range: 300–2000 ppm / 300–10,000 ppm (optional)
• CO2 hysteresis: 10–200 ppm (recommended: 50 ppm)
• Temperature range: 10.0–45.0 °C
• Temperature hysteresis: 0.0–5.0 °C
• Humidity range: 0–100% RH
• Humidity hysteresis: 10–100% RH
• Day/night detection: Yes (via CO2 sensor)
• Display characters: 4 x 20

Technical Specifications

• Input: 100/240V 50/60 Hz
• CO2 power output: 100–220V
• Fan output: 4.5A / 7A / 14A
• Internal use: 3 Watt
• CO2 relay: 8 Amp
• CO2 fuse: 4 Amp
• Triac: 8–24 Amp (depending on version)
• Fan fuse: 5A (base) / 15A (14A version)
• Power cord: 3 x 0.75 mm² or 1.5 mm², 1.7 m
• Relay rating: AC 5A
• Software version: v2.13 (updated 03-02-2019)

Dimensions and Weight

• Product dimensions: 21 x 22 x 10 cm (HxWxD)
• Product weight: 1550 g
• Package dimensions: 25 x 29 x 17 cm (HxWxD)
• Package weight: 2100 g

Box Contents

• TechGrow T-2 Pro CO2 Controller
• Mounting kit
• 5-meter UTP cable
• Spare fuse
• User manual