2947 TechGrow, 12010, S-4 sensor 0-2000ppm AUTO calibration (Co2, light, temp, RH)

TechGrow, 12009, S-4 sensor 0-2000ppm AUTO calibration (CO2/light/Temperature/RV)

Same as the standard S-4 but with Automatic Baseline Calibration (ABC function)
This calibration is performed to eliminate the zero gradient of the infrared sensor.
The ABC function is always turned on once the sensor is turned on.

It is assumed that there isDuring the calibration cycle in the ventilated room
fresh air with a value of approximately 400 ppm will be present for some time. This makes the sensor
unsuitable for use in enclosed rooms with high COâ‚ values, such as greenhouses.