Features: 1Easy to use, no power supply is needed, just insert the probe into the soil to be tested. 2It can measure soil humidity/PH/illuminance required for photosynthesis of plants. 3With light weight, small size, PH meter can be operated with one hand, reducing operator fatigue. 4Soil tester has high stability, which can accurately measure the soil moisture and PH value. 5Made of high?quality ABS material, soil moisture meter is durable and has long service life. Item Type: Soil Tester Material: ABS Use: Measure PH value, humidity and illuminance PH Value: 4.5 Very Strong Acid 4.55.5 Strong Acid 5.56.5 Acidity 6.57.5 Neutral 7.58.5 Alkaline 8.59.5 Strong Alkaline 9.5 Very Strong Alkaline How to Use: 1. When measuring the PH and humidity of the soil, first insert the probe into the soil as deeply as possible. (10CM has been uploaded) 2. Move the button on the pen to MOIST, MOIST is the moisture button, the corresponding table is MOIST, DRY is dry, WET is wet, the value 1-3 (red part) indicates that water is needed, 4-7 (green part) is appropriate. Please adjust the watering time according to the plant species. 8-10 (blue part) means it is too wet. 3. Move the button on the pen to PH, PH is the PH key, the value on the corresponding table is 8-3.5, ALKALINE is alkali, ACDIC is acid, and the value 7 is basically neutral. The smaller the number, the greater the acidity. Please adjust the soil PH according to the plant species. 4. The LIGHT key is the illuminance. The measurement range is 0-2000lm. The larger the value, the more powerful the light. Please decide whether you need shade according to the plant species. (Be careful not to touch the stone when inserting the electrode during use, and don't use too much force, otherwise it will easily damage the electrode. Wash the electrode after use.) 5. Move the button on the pen to MOIST, MOIST is the moisture button, the corresponding table is MOIST, DRY is dry, WET is wet, the value 1-3 (red part) indicates that water is needed, 4-7 (green part) is appropriate. Please adjust the watering time according to the plant species. 8-10 (the blue part) means it is too wet. 6. Move the button on the pen to PH. PH is the PH key, the corresponding table is 8-3.5, ALKALINE is alkali, ACDIC is acid, value 7 is basically neutral, the smaller the number, the greater the acidity, please Adjust the soil PH according to the plant species. The LIGHT key is the illuminance. The measurement range is 0-2000lm. The larger the value, the more powerful the light. Please decide whether you need shade according to the plant species. Soil PH: Soil PH is also called soil reaction. It is the acid-base reaction of the soil solution. Mainly depends on the concentration of hydrogen ions in the soil solution, expressed in PH. A solution with a PH value equal to 7 is a neutral solution; a PH value less than 7 is an acidic response; a PH value greater than 7 is an alkaline reaction. 1 x Soil Tester