Table 1: Specification of sensors.

- Temperature Sensor RH Sensor CO2 Sensor O2 Sensor
Sensing Element K-type
Thermocouple
Macro-molecule HPR-MQ Infrared Ray Galvanic Type
Measuring range 0 to 50°C 20% to 90% RH 0-2% 0-100%
Accuracy before calibrating 0.5°C 3% RH at 25°C 400ppm 0.2%
Precision 0.1°C 1.0% RH 10ppm 0.01%
Accuracy after calibrating 0.15°C 1.1% RH 50ppm 0.05%