HM Digital TDS-4 Pocket Size TDS Tester

HM Digital TDS-4 Pocket Size TDS TesterIdeal for residential and commercial use. This meter shuts off automatically after 10 minutes of non-use to conserve batteries. Includes a TDS (Total Dissolved Solids) chart sticker on the back of the meter that explains TDS values. Large and easy to read LCD screen. Smallest and lightest TDS meter on the market. Factory calibrated. Can be recalibrated with a mini-screwdriver.