1、Digital, the resolution can be up to 14 bits 2、Internal self-calibration, no calibration required 3、Close combination of temperature and humidity for convenient measurement 4、High reliability and long-term stability 5、I2C serial interface is easy to integrate Features: 1. Digital, the resolution can be up to 14 bits 2. Internal self-calibration, no calibration required 3. Close combination of temperature and humidity for convenient measurement 4. High reliability and long-term stability 5. I2C serial interface is easy to integrate 6. Compact product structure for field application and product integration 7. Suitable for computer room monitoring, warehouse, construction site, concrete test block inspection, agricultural greenhouse, flower nursery, etc.   Specification: Condition: 100% Brand new Item Type: Temperature Humidity Sensor Model: FS400-SHT20/21/25 Working Current: <10mA Temperature Measurement Range: -20℃ ~ 100℃ Humidity Measurement Range: 0~100%RH Working Conditions: - 40℃ ~ 120℃, 0 ~ 99% RH Storage Conditions: - 20℃ ~ 80℃, 0 ~ 95% RH Housing Material: Copper, plastic Line Length: Approx. 150cm / 59.1in Weight: Approx. 115.8g / 4.1oz Package Size: Approx. 20 x 14 x 3.7cm / 7.9 x 5.5 x 1.5in Optional Style: SHT20, SHT21, SHT25 FS400-SHT2X Series Humidity Accuracy %RH Temperature Accuracy ℃ Voltage V SHT20 ±3 ± 0.3 3.3 SHT21 ±2 ± 0.3 3.3 SHT25 ± 1.8 ± 0.2 3.3   Package List: 1 x FS400-SHT2X Temperature Humidity Sensor 1 x Cable   Note: One. Relative humidity of air is a function of temperature. Air temperature has a great influence on relative humidity. Various compounds such as acid and alkali salts have a significant impact on the physical properties of water. The following items should be noted when using: 1. The temperature and humidity sensor should be installed in a place where the temperature is relatively stable and most representative of the measured ambient temperature and humidity. 2. Avoid installation in places where the temperature changes drastically. 3. Avoid installation in places where the air is flowing. 4. Avoid installing dead corners where air does not flow. 5. Avoid using it in a salt spray environment. 6. Avoid use in corrosive gas environments. 7. Avoid installing dead corners where air does not flow. Second, working conditions: The sensor has normal performance within the recommended operating range. Long-term exposure to conditions outside the normal range, especially at humidity >80%, may result in temporary signal drift (drift after 60 hours +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. Third, storage conditions and operating instructions: 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 smell will cause the sensor reading to drift