covering the typical range for residential RO/DI systems

78 associated with brain and nervous system damage

68 (optimized for nutrient solutions)

Calibration: Factory calibrated at 342 ppm NaCl

HM Digital TRM-1 Triple Inline TDS Monitor - 3-Point Water Quality Tester 0-9990 ppm 810666003310 covering the typical range forTRM 1: Triple In Line TDS Monitor The TRM 1 is a unique monitor offering the user 3 points of contact during the filtration process. This TDS monitor allows for checking TDS levels at 3 points, such as with DI RO (deionization reverse osmosis), or multiple points in an RO system, and more. FEATURES: Displays TDS levels of the three sensing points with electrode probes Highly efficient and accurate due to its advanced microprocessor technology Auto Off