The TDS meter digital water tester is great for checking your tap water quality and knowing when to change a filter.

Custom printed logo or water saving message. 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.

Get precise water quality results in seconds with this compact TDS pen. Featuring advanced sensor technology and an LCD screen, this device makes it simple to test for impurities, helping you identify safe drinking water or maintain optimal quality in hydroponics, aquariums, or RO systems. Durable and user-friendly, it's a must-have for anyone looking to stay informed about water quality.

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.