Quick and accurate way of knowing your TDS FeaturesMeasures and displays TDS values before and after water flows through treatment system. Real time calculation of removal rate. Removal rate indicator: Removal Rate > 80% Green Flash Removal Rate < 80% Red Flash 3-digit LCD display Generic design fits all systems. Easy mounting. Button control (battery saving). SpecificationsRange: 0 to 999ppmSensitivity:1PPMAccuracy:+/- 2%Removal Rate Indicator:>80% green flash<80% red flashTDS Probe Tubing: 1/4" Button control Dimension: 100(H)mm x 40(W)mm x 8mm(T)Mounting: 2 mounting clips includedHousing Color: White