Product description The soil nitrogen, phosphorus and potassium sensor is suitable for detecting the content of nitrogen, phosphorus and potassium in the soil, and judging the fertility of the soil by detecting the content of nitrogen, phosphorus and potassium in the soil, thereby facilitating the customer's systematic assessment of the soil condition. Features It is widely used in rice fields, greenhouse planting, rice, vegetable planting, orchard nursery, flower and soil research, etc. Product description The soil nitrogen, phosphorus and potassium sensor is suitable for detecting the content of nitrogen, phosphorus and potassium in the soil, and judging the fertility of the soil by detecting the content of nitrogen, phosphorus and potassium in the soil, thereby facilitating the customer's systematic assessment of the soil condition. Features It is widely used in rice fields, greenhouse planting, rice, vegetable planting, orchard nursery, flower and soil research, etc. Parameter DC power supply (default) DC 5-30V Maximum power consumption ≤0.15W (@12V DC, 25℃) Operating temperature 0℃~55℃ Nitrogen phosphorus potassium range: 1-1999 mg/kg (mg/L); resolution rate: 1 mg / kg (mg / L), accuracy of: ± 2% FS Response time 20cm vertically, insert the sensor needle horizontally into the pit wall at a predetermined depth, and fill the pit tightly. After a period of stability, measurement and recording can be carried out for several days, months or even longer. 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 when using 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, and the entire sensor can be soaked in water. 5. Due to the presence of radio frequency electromagnetic radiation in the air, it is not suitable to stay energized in the air for a long time. 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 when using 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, and the entire sensor can be soaked in water. 5. Due to the presence of radio frequency electromagnetic radiation in the air, it is not suitable to stay energized in the air for a long time.