1accurate testing,low price, new type 2easy to operate,convenient to carry 3wide application,for any colorless alkali solution Water test liquid(paper)/pH test    Feature:accurate testing,low price, new type,easy to operate,convenient to carry   ...

Water test liquid(paper)/pH test 1.the drop in acidic will turn red 2. the drop in base will turn blue 3. Manufacturer Water test liquid(paper)/pH testUse profession and ver efficient methods to determine the residual pH content in the public water and according to the changes...