The FS304 temperature and humidity sensor probe is a cable type sensor in the digital temperature and humidity sensor series. The sensor outputs a calibrated digital signal in a standard I2C format. The FS304 uses the world's most advanced temperature and humidity sensors as the core components to ensure high reliability and excellent long-term stability. The sensor includes an improved capacitive humidity sensing element and a standard energy gap temperature sensor element for improved performance. Therefore, the product has the advantages of excellent quality, high protection level, ultra-fast response, strong anti-interference ability and high cost performance. Features: 1. The temperature and humidity sensor probe is a cable type sensor in the digital temperature and humidity sensor series. 2. Using the world's advanced temperature and humidity sensors as the core components to ensure high reliability and excellent long-term stability. 3. It has the advantages of excellent quality, high protection level, ultra-fast response, strong anti-interference ability and high cost performance. 4. Can be applied in computer room monitoring, HVAC, weather station, warehouse, construction site, concrete test block inspection, agricultural greenhouse, flower nursery and soil temperature and humidity measurement. 5. Fully calibrated, excellent long-term stability. 6. Digital output, I2C interface. 7. Low power consumption, low cost, small size. 8. DFN package for reflow soldering. 9. Waterproof, dustproof, rustproof, corrosion resistant. Specification: Condition: 100% Brand New Item Type: Temperature and Humidity Sensor Model: FS304-SHT20/FS304-SHT21/FS304-SHT25 (Optional) Working Current: <10mA Temperature Measurement Range: -20 ° C ~ 100 ° C Humidity Measurement Range: 0~100%RH Working Conditions: - 40 ° C ~ 125 ° C, 0 ~ 99% RH Storage Conditions: - 20 ° C ~ 80 ° C, 0 ~ 95% RH Shell: 304 stainless steel, IP67 waterproof Line Length: Approx. 150cm / 59.1in Weight: 61 g / 2.2 oz(approx.) Model Humidity Accuracy (%RH) Temperature Accuracy (°C) 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 Temperature and Humidity Sensor 1 x Line Mark Precautions: 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 vapor. 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, to avoid installation in the dead air where the air does not flow. 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 (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. 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 vapor will cause the sensor reading to drift.