Divinext multifunctional water testing kit: tds + ph + ec + temperature meter digital water purity tester with lcd display tds ec ph temperature conductivity ppm acidity alkalinity indicator portable pen type hydrotester combo of tds/ph/ec meter total dissolved solids (tds), electrical conductivity (ec), potential of hydrogen (ph) for measuring & testing of water quality, food, beer, soil, wine, laboratory, industrial, water & food applications digital ph meter