The measurement of adopts the general rapid detection method, so there are certain error, Use with caution for planting reference. However, the sensor supports the function of writing data. You can use standard instruments to measure then write in to provide data for monitoring system. Important Reminder sensor is for soil temperature and moisture, PH, conductivity (EC),measurement, compared with the original German high- sensors and soil drying method of weighing the actual calibration, high , fast response, stable output. By the soil salt content of small, suitable for all kinds of soil. Long-term buried in the soil, to long-term electrolysis, resistance, vacuum potting, completely waterproof., Weight: 0.93255536826 pounds, Manufacturer: Yoeruers