Soil nitrogen, phosphorus and potassium sensor is suitable for detecting the content of nitrogen, phosphorus and potassium in soil. It can judge the fertility degree of soil by detecting the content of nitrogen, phosphorus and potassium in soil, thus facilitating the systematic evaluation of soil conditions by customers

Features

• Easy to measure, not only for professionals, but also for non-professionals, just insert the instrument into the soil to measure
• High precision, fast speed measurement, accuracy up to within 2%, and increased stability, more accurate data
• The resolution is up to 1mg/kg (mg/l), on-site quick inspection, easy to carry, and can be read by inserting into the soil
• Portable measurement, accurate grasp of the soil fertility status, the user can measure the soil condition at any time, according to the soil condition, the soil fertility can be balanced to achieve a suitable growth environment for the plant
• The sensor uses high quality chip, low power consumption, high sensitivity and stable signal
• IP68 grade waterproof and dustproof, to ensure the normal operation of components for a long time. Good sealing performance to prevent moisture from entering the interior of the instrument
• High quality probe, rust resistance, electrolytic resistance, salt and alkali corrosion resistance, to ensure the long-term operation of the probe part. Therefore, it is suitable for all kinds of soil
• Suitable for agricultural production, greenhouse breeding, orchard nursery, soil research
• It is suitable for the detection of alkaline soil, acid soil, substrate soil, seedling bed soil, coconut bran soil

Measuring Ranges:

Specifications:

• Power supply: 5-30VDC
• Maximum power consumption: ≤0.15W
• Operating temperature: -40~80℃

NPK parameters:

• Range: 0-1999 mg/kg(mg/L)
• Resolution: 1 mg/kg(mg/L)
• Precision: ±2%FS
• Response time: ≤1S
• Protection grade: IP68
• Probe material: 316 stainless steels
• Sealing material: Black flame-retardant epoxy resin
• Default cable length: 2 meters, cable length can be customized
• Output signal: RS485
• Baud rate: 4800 or 9600

TRONIC.LK Recommendation: Buy a RS485 to USB module such as MD0547 or MD0552. Connect the module to PC, watch the video and try the software in the following links and read the values first. After that interface the module to Arduino UNO or ESP32 as you prefer. Note that, if you are working with ESP32, buy the 3.3V supported RS485 to TTL module, MD0158. The MD0053 module requires 5V to operate and it will burn the ESP32 if interfaced directly without level shifters. If you use a board such as Arduino UNO or Mega, you can use the MD0053 module.

1. Helpful Video: Youtube
2. Download free Modbus software: QModMaster
3. Useful Download: PC software and Arduino example