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Hm digital dm-1 inline dual tds monitor tester meter
DM-1: In-Line Dual TDS Monitor
Measure the tap water coming in vs. the purified water going out of your water filtration system at any time.
* Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use.
* Dual Range 0-9990 ppm (From 0 - 999 ppm the resolution is 1 ppm. From 1000 to 9990 ppm, the resolution is 10 ppm, indicated by a blinking 'x10' image.)
* Comes equipped with John Guest Quick-Connect T-fittings as shown.
Cable Length: 24.5" (including sensor)
Fittings: 1/4" standard, also available with 3/8" or 1/2"
Battery life: approx. 1000 hours of continuous use
Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)
With the DM-1, you can easily determine your RO system's performance by calculating the percent rejection. Once you have obtained the TDS levels of your feed water (IN) and product water (OUT)
NOTE: All water purification and filtration systems are different. Please contact the manufacturer of your RO or DI system to determine when you should change your filter cartridges or membranes (based on TDS levels and/or percent rejection).
