IQSS-NPK Soil NPK sensor RS485, Nitrogen, Phosphorus and Potassium, 2m CableIQSS NPK Soil NPK sensor RS485, Nitrogen, Phosphorus and Potassium, 2m Cable IQSS NPK soil NPK sensor, also known as the soil nutrient quick tester to detect the content of nitrogen, phosphorus and potassium in the soil. By detecting the content of nitrogen, phosphorus and potassium in the soil, it can judge the fertility of the soil, and then it is convenient to evaluate the soil condition systematically. The sensor rapid measurement method actually