Important Reminder 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 NPK data. You can use standard instruments to measure NPK then write in to provide data for monitoring system. sensor is for soil temperature and moisture, PH, conductivity (EC),measurement, compared with the original German high-precision sensors and soil drying method of weighing the actual calibration, high precision, fast response, stable output. By the soil salt content of small, suitable for all kinds of soil. Long-term buried in the soil, resistant to long-term electrolysis, corrosion resistance, vacuum potting, completely waterproof. color: Black Material: ABS+metal Functions and Features (1) The sensor compact design, easy to carry, installation, operation and maintenance. (2) reasonable structure design, stainless steel probe life assurance. (3) soil less affected areas are widely used. (4) High measurement accuracy, reliable performance, ensure proper operation (5) fast response, high data transmission efficiency. Applicable to the field of water-saving irrigation, greenhouse vegetables, flowers, gardening, grass pastures, soil-speed measurement, plant cultivation, scientific testing. Note: The production batches are different and the labeling is random, which does not affect the applicability. Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 2 x Soil Detector