4-in-1 soil testing device: light detector, soil acid meter, pH meter, hygrometer and thermometer

Material: Plastic. Housing dimensions: 28.5 x 6.4 x 3.5 cm. Probe length: 20 cm. Operating temperature: 5 °C to 40 °C. Weight: 0.19 kg. Power supply: 9V battery (not included). III. Instructions for use: Insert the battery and remove the protective cap from the probe before use. 1. Light measurement: A. Press the ON button to turn on the device. B. Point the device at the highest point of the light sensor window. C. The current light intensity will be displayed on the LCD screen. Note: Do not cover the light or cast shadows on the light sensor. 2. pH measurement: A. Press the [pH/°C] button on the back to select the pH setting. B. Insert the probe vertically into the soil; the measurement should be taken as quickly as possible. C. Press the ON button to start the measurement. D. The measured pH value is displayed on the LCD screen. E. Take several measurements to obtain the desired accurate value. Note: 1) Insert the probe vertically into the center of the top of the plant stem. 2) Gently press it into the soil to avoid damage. 3) If the soil is too dry or too nutrient-rich for an accurate pH measurement, you can lightly water it and measure again after half an hour. Soil pH classification: < 4.5: very acidic; 4.5–5.5: strongly acidic; 5.5–6.5: acidic; 6.5–7.5: neutral; 7.5–8.5: alkaline; 8.5–9.5: strongly alkaline; > 9.5: very alkaline. 3. Moisture Measurement: A. Press the [pH/°C] button on the back and select the °CB setting. Insert the probe as vertically as possible. C. Press the "NO" button to start the measurement. D. The soil moisture value will be displayed on the LCD screen.