VDL - digital CO2 controller – precise measurement and control of CO₂, temperature and humidity

The VDL Digital CO₂ Controller is a wall-mounted controller designed for precise measurement and automatic regulation of carbon dioxide (CO₂) concentration in enclosed spaces. It uses NDIR sensor technology and an external probe to monitor CO₂, temperature and humidity. Convenient for greenhouses, grow rooms, laboratories and workspaces.

Detailed features

• Measurement technology: NDIR sensor – ensures stability and durability.
• Display: Colour LED or LCD screen with separate zones for CO₂, temperature, humidity, current time and alarms.
• Device control: Built-in relay with plug, allowing external devices (e.g. a CO₂ generator or fan) to be activated/deactivated according to CO₂ levels.
• Intelligent modes:
  • Plant Mode – activates the CO₂ generator at low values.
  • Human Mode – starts ventilation at high CO₂ levels.
• Day/Night sensor: Automatically detects lighting and optimises operation according to day or night mode.
• Alarms: Programmed audible warnings for excessively high CO₂ concentrations.
• Historical data: Recording and graphical display of maximum and minimum values for the past week.
• Measurement range and accuracy:
  • CO₂: 0–9999 ppm
  • Temperature: 0–50 °C
  • Humidity: 5–95 % RH
  • Resolution:
    • CO₂: 1 ppm (0–1000); 5 ppm (1000–2000); 10 ppm (>2000)
    • Temperature: 0.1 °C
    • Humidity: 1 % RH
  • Accuracy:
    • CO₂ < 2000 ppm: ±50 ppm or ±5%
    • CO₂ > 2000 ppm: ±10%
    • Temperature: ±0.6 °C
    • Humidity: ±5 % (25 °C, 10–90 % RH) / ±7 % (other ranges)
• Probe with cable: External probe with a cable about 4.5 m long for flexible positioning in the carbon environment.
• Dimensions and weight:
  • Control panel: approx. 15.6 × 11.6 × 3.9 cm
  • Probe: approx. 11.7 × 3.5 × 2.7 cm
  • Weight: ~750 g
• Operating conditions: 0–50 °C, 5–95 % RH
• Warm-up: Ready for use after about 30 seconds.

Recommendations for use

• Install the wall controller in a convenient place and ensure the probe cable is positioned among the plant canopy for precise measurements.
• Select “Plant Mode” to automate CO₂ supply through a generator. Or select “Human Mode” for safe ventilation when levels are excessive.
• Use the day/night function to optimise resource savings and maintain safe conditions.
• Program alarms for high concentrations and set the desired CO₂ values and hysteresis.
• Monitor weekly minimum and maximum values to analyse and optimise the control process.

Summary – Benefits

• Accuracy and reliability: NDIR technology and high measurement accuracy.
• Integrated control: Controls external devices by CO₂ level for efficient automation.
• Precise monitoring: CO₂, temperature and humidity on one screen.
• Flexibility: Suitable for greenhouses, laboratories, home growing or workrooms.
• Future support: The probe can be replaced for long-term durability.
• Easy to use: Quick setup, calibration and programming.