Legacy (CO2 PPM Monitor)


2 in stock

SKU: Beta-8 Category:


Choose your desired CO2 parts per million(PPM) level and the controller will automatically maintain that specified CO2 level. A built-in photocell located on the remote sensor automatically deactivates CO2 injection during the night time. A remote sensor with 16′ cable allows close placement to the plant canopy.

In the night mode: The controller will always turn off the output of CO2 device.

In the day mode:
A)If the fuzzy logic is off the unit will OPEN the output of CO2 device when the current CO2 value is less than the setpoint. The unit will CLOSE the output of CO2 device is the current CO2 value is greater than the CO2 setpoint plus dead band value.
If the fuzzy logic is on, the unit will fully OPEN the output of CO2 device when the current CO2 value is much lower than the CO2 setpoint. When the current CO2 value is close to the CO2 setpoint, the unit will use fuzzy logic function and sent the PWM (Pulse Width Modulation) signal to control the output of the CO2 device. The PWM cycle is 5 seconds.


  • Built-in Photocell detecting day and night status
  • LED screen display simple to operate
  • Alternative Humidifying or Dehumidifying Function
  • CO2 sensor with 16′ cable for close placement to the plant canopy
  • 3 year warranty


Input Voltage: 120 Volts AC
Output Relay Rating: 10A
Fuse Rating: 6A/250V~
AC Power Cord Length 1.8m
CO2 Control Range: 400-2000 PPM
CO2 Deadband: 20-200 PPM
CO2 Accuracy: ±50 PPM
CO2 Sensor Type: NDIR (Nondispersive Infrared)
Packaging Dimensions: 275mm(L) x 87mm(W) x 94mm(H)
Gross Weight: 0.56kgs

Additional information

Weight 1.5 lbs
Dimensions 10 × 3 × 4 in