Lumive PH and TDS Water Quality Meter Kit can provide a complete measuring range of pH 0 - 14, as well as accurate and speedy readings. It is excellent for all water quality applications and testing of impurities via TDS and pH testing for home, laboratory, aquariums and swimming pools. Lumive water quality kit comes with a PH meter, calibration buffers, 3 in 1 TDS EC and Temperature Meter with a secure case. A lightweight, portable design for portability and convenience.