RS485 5Pin Soil PH NPK Temperature and Humidity EC Sensor Conductivity Detector Tester Condition: Item Type: Soil Sensor Material: Plastic+Steel+Epoxy Color: As shown in the picture Size: Approx.13.8x4.5cm/5.4x1.8in Weight: Approx.290g/10.2oz Power Supply: 12-24V DC Output Signal: RS485 Temperature Measurement Range: -40℃-80℃ Temperature Accuracy: ±0.5℃ Temperature Resolution: 0.1℃ Moisture Measurement Range: 0-100% Moisture Accuracy: ±3% within the range of 0-53%; ±5% within the range of 53-100% Moisture Resolution: 0.10% Conductivity Measurement Range: 0-10000us/cm Conductivity Resolution: 10us/cm pH Measurement Range: 3-9pH pH Measurement Accuracy: ±0.3pH pH Resolution: 0.01pH Measuring Range of Nitrogen, Phosphorus and Potassium: 0-1999mg/kg NPK Measurement Accuracy: ±2%F.s Resolution of NPK: 1mg/kg (mg/l) Storage Environment: -20℃-60℃ Working Pressure Range: 0.9-1.1atm Response Time: <1s Protection Level: IP68 Installation Method: All buried or all probes inserted into the measured medium Precautions: 1. All steel needles must be inserted into the soil during measurement. 2. Avoid strong sunlight directly shining on the sensor and cause excessive temperature. Pay attention to lightning protection in the field. 3. Do not bend the steel needle violently, pull the lead wire of the sensor forcefully, and do not hit or hit the sensor violently. 4. The sensor's protection grade is IP68, so the entire sensor can be soaked in water. 5. Due to the existence of radio frequency electromagnetic radiation in the air, it is not suitable to stay in the air for a long time with electricity. 6. Please be careful not to connect the wrong wiring sequence, the wrong wiring will cause the equipment to burn.