Features: EC/TDS-661 soil meter is used to test the TDS value and conductivity of soil to determine the salt content of the soil. It also has the function of testing the ambient temperature. Products are widely used in agriculture, forestry, horticulture, tree planting, greenhouse planting, agricultural planting, water treatment industry, etc. Specifications: Specifications: 1. Range: EC: 0-10000us/cm (0-10ms /cm) TDS : 0-10000ppm Temperature: -50C-70C (-58F-158F) 2. Resolution EC: 10us /cm (0.01ms/cm) TDS: 10ppm Temperature: 0.1C (0.2F) 3. Accuracy EC / TDS : 2 % FS Temperature: 1C (2F) 4. Battery: 4x1.5V (AG13) (not included) 5. Temperature compensation: 0&8451;-50&8451; 6. Dimensions: 285mm x 35mm x 35mm 7. Weight: 100g Operating information &65306; 1. Remove the protective cover. 2. Press the ON key to turn on the meter. 3. Place the probe to the desired depth and saturate the soil with deionized water if necessary. Or immerse the electrode in the solution to be measured. 4. Wait for the reading to stabilize. 5. Press the "C/F" button to switch between Celsius and Fahrenheit. 6. After use, press the OFF key to turn off the meter. Rinse the electrode with distilled water to minimize contamination. Packing list&65306; 1*Waterproof soil EC and temperature Tester 1*Small screwdriver 1*English manual