TDS Meter/ Water Quality Tester

Used to test drinking water quality 1. Easy-to-use. Just put the test pen into the water and press the button, then the tds(total dissolved solids) of water shows on the display. Water, cell water, filtered water, aquarium water, a tds meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. Tds = total dissolved solids, which is any salt, metal or mineral in the water. With the push of a button, the tds can tell you your overall water purity level,which will be displayed on the screen in ppm (parts per million). The lower the tds level, the purer the water the tds is a great tool for drinking water,water filtration and purification, colloidal