XIANQI The PH sensor uses a highly sensitive probe, which is inserted into the soil to measure the desired value. [Plug and Play] The soil PH meter can be used without batteries, it is plug and play and easy to operate to test the PH value of the soil. [Meaning of the values] The probe of the meter is in the middle for neutral soil (pH 7) and to the left for alkaline soil. The right side is acidic soil. [Object of use] The tester only tests soil etc. It is not suitable for dry flour, small stones, wood and wood chips etc. [Easy to use] The Soil PH Analyser is made of ABS material, which is hard and reliable, small and light, very convenient and easy to carry. Colour: Green Size: 145*30mm Product list: 1*Soil moisture meter