The tds meter Highly efficient and accurate due to its advanced microprocessor technology, testing range from 0-9990 ppm, ppm. The TDS meter reading will be displayed on the LED screen in ppm (parts per million), one million). One measurement can be completed within 5 seconds. Press "ON/OFF" button and the ppm meter will work. Pressing "HOLD" button and the reading value will be held though. It's used with 2pcs 1.5V batteries, can use more than 2 years, it will be power-off automatically after stop using in 5 minutes to save the battery. A large, easy-to-read LCD screen display on this TDS water testing meter makes it easy to see results.
