Temperature Humidity Sensor Probe Sensitive Accurate Digital Soil Temp Humidity Sensor Probe DC3.3V Item Type: Temperature Sensor Probe Material: Copper, Plastic Model: FS400 SHT45 Working Current: Less than 15mA Humidity Accuracy: ±1.5% RH Temperature Accuracy: ±0.1°C Working Voltage: 3.3V Temperature Measurement Range: -20°C to 100°C Humidity Measurement Range: 0 to 100% RH Communication Interface: I²C Working Conditions: -20°C to 90°C, 0 to 99% RH Storage Conditions: -20°C to 80°C, 0 to 95% RH Shell: Copper, Plastic Cable Length: Approx. 150cm / 59.1in Product Features: 1. Digital output with resolution up to 14 bits 2. Internal self-calibration, no external calibration required 3. Integrated temperature and humidity sensing for accurate dew point calculation 4. Resistant to rain, dust, and rust; designed for reliable long-term stability Usage Notes: Relative humidity is temperature-dependent, and ambient temperature significantly affects RH readings. Exposure to chemical vapors, acids, alkalis, or salts may impact sensor performance. Follow these guidelines for optimal operation: 1. Install the sensor in a location with stable temperature that best represents the surrounding environment 2. Avoid areas with rapid temperature fluctuations 3. Avoid locations with strong airflow 4. Avoid dead zones with no air circulation 5. Do not use in salt spray environments 6. Do not use in corrosive gas environments Operating Conditions: Prolonged exposure to conditions outside the specified range, especially humidity levels above 80%, may cause temporary signal drift (up to +3% RH after 60 hours). Once returned to normal operating conditions, the sensor will gradually self-recover to its calibrated state. Extended use under extreme conditions may accelerate aging and reduce lifespan.