3 in 1 TDS EC Water Quality Test Meter Temperature Digital Display for Drinking Water Aquariums Pool Spa Description: This is a digital TDS meter tester to test the filter water quality purity. To check the performance of your water filter, to check for hardness (1grain=17ppm), to make sure you always drink pure water. Saves measurements for convenient reading and recording new arrival. Features: With locking function, it is easy to read and record, and the instrument will lock the reading; 5 minutes auto off function, battery will not run Water quality detection adopts large screen liquid crystal display, which is easy to read. Because of its advanced microprocessor technology, it is efficient and accurate. Support automatic temperature compensation, water quality detection can switch between TDS and conductivity. Automatic shutdown function: turn off the meter after 5 minutes without use, save battery. Small size, but suitable for testing pH balance of drinking water, swimming pool,
