HM DIGITAL POCKET SIZE TDS/TEMP METER
The TDS-4TM handheld meter is ideal for testing TDS and salt levels of freshwater aquariums and ponds. It can also be used for testing water filtration and purification systems, such as RO and DI, to know when to changes filters and membranes. Main Features: • Pocket size makes it ideal for portability and storage. • Hold Function • Auto-off Function (After 10 min.) • Factory calibrated with 342 ppm NaCl solution.