Features: _x000D_1. This soil temperature and humidity sensor is a digital output with a resolution of up to 14bits. _x000D_2. Internal self-calibration, no calibration required. _x000D_3. High reliability and long-term stability. _x000D_4. The combination of temperature and humidity is convenient for dew point measurement. _x000D_5. Compact structure, I2C output, suitable for field applications and product integration. _x000D_6. Plastic square box probe, the housing is not waterproof, not dustproof _x000D_7. Used for high-quality environment such as computer room monitoring, HVAC, greenhouse warehouse. _x000D_ _x000D_Specification: _x000D_Condition: 100% Brand New _x000D_Item Type: Temperature and Humidity Sensor _x000D_Model: FS300-SHT20/FS300-SHT21/FS300-SHT25 (Optional) _x000D_Working Current: 80%, may result in temporary signal drift (after 60 hours drift +3% RH). When returning to normal After the working conditions, the sensor will slowly return to the calibration state. Prolonged use under abnormal conditions will accelerate the aging of the product. _x000D_ _x000D_Storage Conditions and Operating Instructions: _x000D_Humidity sensors are not ordinary electronic components and require careful protection. This must be taken seriously by users. Prolonged exposure to high concentrations of chemical vapor will cause the sensor reading to drift. _x000D_ 1This soil temperature and humidity sensor is a digital output with a resolution of up to 14bits. 2The combination of temperature and humidity is convenient for dew point measurement. 3Compact structure, I2C output, suitable for field applications and product integration. 4Plastic square box probe, the housing is not waterproof, not dustproof 5Used for high-quality environment such as computer room monitoring, HVAC, greenhouse warehouse.