Soil Nitrogen Phosphorus and Potassium Sensor RS485

Soil parameters measuring

N=Nitrogen P=Phosphorus K=Potassium

• Measuring range: 1-1999 mg/kg(mg/L)
• Resolution：1 mg/kg(mg/L)
• Accuracy: ±2%FS
• Response time: ＜1S

Specification

Interface Description

Register Address

coefficient and calibration like the formula

Y=AX+B

Y is reading value

X is reading value

A is coefficient

B is coefficient

Communication Protocol Example

    E.g., Read Device Address Nitrogen, Phosphorus, Potassium

Master sends

Sensor responds

How to calculate Nitrogen Phosphorus and Potassium

Nitrogen = 0020 H = 32 => Nitrogen = 32 mg/kg

Phosphorus = 0025 H = 37 => Phosphorus = 37 mg/kg

Potassium = 0030 H = 48 => Potassium = 48 mg/kg