HM Digital TDS-4 Pocket-Size TDS Meter 891144000397 This is true of all

This is true of all pH probes

250 hours continuous use (3 x 1

Weight: 81g (2

it is ideal for testing applications such as hydroponics & gardening

ozone system monitoring

HM Digital TDS-4 Pocket-Size TDS Meter 891144000397 This is true of allA TDS tester that's ideal for all water purification applications, drinking water testing, pools & spas, fresh water aquariums, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket at all times! Features The smallest and lightest TDS meter on the market. Sleek design is perfect for personal or consumer use. Advanced microprocessor technology. Hold Function: saves measurements for convenient reading