Features1Easy to measure, not only for professionals, but also for non-professionals, just insert the instrument into the soil to measure. 2High precision, fast speed measurement, accuracy up to within 2%, and increased stabilitym, more accurate data. 3The resolution is up to 1mg/kg (mg/l), on-site quick inspection, easy to carry, and can be read by inserting into the soil. 4Portable 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. 5The sensor uses chip, low power consumption, high sensitivity and stable signal. 6IP68 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. 7 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. 8Suitable for agricultural production, greenhouse breeding, orchard nursery, soil research. 9It is suitable for the detection of alkaline soil, acid soil, substrate soil, seedling bed soil, coconut bran soil.SpecificationCondition: 100% Brand NewItem Type: Soil NPK SensorMaterial: ABSColor: As shown in the pictureLength(not include cable): Approx.14cm/5.5inWidth: Approx.4cm/1.6inWeight: Approx.203g/7.2ozMeasuring Range: 0?1999mg/kgWorking Humidity: 5 to 95% (relative humidity), no condensationMeasurement Accuracy: 2%F.sResolution: 1mg/kg (mg/l)Baud Rate: 2400/4800/9600Response Time (T90, seconds): less than 10Communication Port: RS485Working Temperature: 5 to 45 Degree CPower Supply: 12V?24V DCProtection Class: IP68 Package List1 x Soil NPK Sensor