【Feature】Equipped with an extended composite electrode with screw joint, suitable for direct measurement in a small diameter container. 【Usage】Digital Soil PH Meter is suitable for aquariums, aquaculture, hatcheries, food processing, laboratories, paper industry, swimming pools and schools. 【Design】High-precision and fast-response PH meter, easy to use. Compact and lightweight design, easy to carry. 【Display】The LCD screen displays the pH value, easy to read in seconds.