27 Jul 5-in-1 Multifunctional Water Quality Analyzer Portable Pen Type C0P2
5-in-1 Multifunctional Water Tester: it can test the water quality of EC,, S.G, Salt, and Temperature with simple and quick way. Wide Applications: it can be used in the field of fishery, aquaculture, laboratory for the water quality testing of drinking water, swimming pool, aquarium,...