Low Prices and Fast Shipping
TDS Meters For Testing of Total Dissolved Solids in Water. Chose handheld or inline TDS meters. Low prices and fast shipping since 1999.
Water Testing, TDS Meters and Test Supplies. Large selection, low prices and fast shipping since 1999.
Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.
See our selection of TDS meters under Water Tests