edge Dedicated Conductivity/TDS/Salinity Meteredge groundbreaking design is the culmination of Hanna's vision, design capabilities, integrated production and world class R&D. edge is a single meter that can measure Conductivity, TDS and Salinity and is incredibly easy to use. edge EC TDS Salinity utilizes four ring conductivity probe technology that allows the user to measure samples from very low conductivity to very high conductivity. edge features a capacitive touch keypad that gives a