Greenhouses with dense crops, in particular, are susceptible to high temperatures and humidity, which can quickly deteriorate various environmental sensors. Therefore, a sensing system with sensor error detection and correction functions is essential to maintain stable environmental measurements and control in greenhouses. In this study, we developed a temperature and humidity sensing system with sensor error detection and error output value correction functions using multiple (three or more) sensors for each environmental parameter. The system detects sensor failures and identifi es the faulty sensor by comparing the measurements from all sensors. It then outputs the average of the remaining sensors’ readings, excluding the faulty sensor’s values, ensuring continuous accurate environmental measurements. Sensor degradation is assessed based on the coeffi cient of variation of the sensor readings, assuming that an increase in variation indicates degradation. To test the system, the sensor malfunctions were simulated. The system successfully identifi ed the faulty sensors and provided corrected values. The coeffi cient of variation, used as an indicator of sensor degradation, increased following the simulated malfunctions. In conclusion, this sensing system can prevent instability in environmental measurements and control greenhouse horticulture due to sensor failures, thus supporting stable crop production.

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