1、High Accuracy: This soil temperature and humidity sensor adopts 4x series casing and 4x series chips, which has more powerful functions, higher accuracy, digitization, and a resolution of up to 14 bits. 2、Excellent Functionality: Using advanced batch technology and excellent hardware design, with high reliability and long life. This sensor probe has full calibration, digital output and I2C interface. I2C serial interface easy to integrate. 3、Strong Stability: This soil sensor probe is characterised by high reliability and long term stability. Humidity sensor is not ordinary electronic components and require careful protection. 4、Wide Application: Soil moisture sensor probe is widely used in server room monitoring, weather stations, warehouses, construction sites, concrete test blocks, agricultural greenhouses, flowers, nurseries and soil temperature and humidity measurement. 5、Easy to Carry: Soil temperature humidity sensor probe is small and light, easy to carry and install, does not take up too much space. 1 x Sensor Probe Item Type: Sensor ProbeModel: FS400 SHT40Operating Current: <15mAHumidity Accuracy: ±3%RHTemperature Accuracy: ± 0.2°COperating Voltage: 3.3VTemperature Measurement Range: -20℃ to 100℃Humidity Measurement Range: 0 to 100%RHCommunication Interface: I²COperating Condition: - 20°C to 90°C, 0 to 99%RHStorage condition: - 20℃ to 80℃, 0 to 95%RHHousing: Copper and plasticCable Length: Approx.150cm / 59.06inFeatures: 1. Digitization, the resolution is up to 14 bits 2. Internal self calibration, no calibration required 3. The close combination of temperature and humidity is convenient for dew point measurement 4. Anti shower, dustproof, rust proof, high reliability and long term stabilityAir relative humidity is a function of temperature. Air temperature has a great influence on relative humidity. Acids, alkalis, salts and other compounds have a significant impact on the physical properties of water vapor. The following matters should be paid attention to when using: 1. The temperature and humidity sensor should be installed in a place where the temperature is relatively stable and can best represent the measured ambient temperature and humidity. 2. Avoid installing in places with drastic temperature changes 3. Avoid installing in places with intense air flow 4. Avoid installing in dead ends where the air does not flow 5. Avoid use in salt spray environments 6. Avoid use in corrosive gas environmentsWorking conditionsThe sensor performs normally within the recommended operating range, see Figure 1Long term exposure to conditions outside the normal range, especially at humidity >80%, may cause temporary signal drift (drift <3%RH after 60 hours)When returned to normal operating conditions, the sensor will slowly return to the corrected stateProlonged use under abnormal conditions will accelerate the aging of the product