3. High- detection of pure copper movement. 2. Plants, in the process of long-term , have formed their own specific requirements for soil acidity and alkalinity, and they can only grow in a particular acidity and alkalinity range. 1. A variety of scenarios, easy to cope with applicable to soil testing, such as pot plants, greenhouses, gardens, soil research, agricultural orchards and other soil testing. 4. Clear scale - no batteries, clear scale table test to see the value more accurate, no batteries, plug and play. 5. Metal Detection ProbeMetal detection sensor can detect and analyse soil moisture more quickly and accurately., Manufacturer: Littimoon