A system and process for treating water are described. In particular it relates to an apparatus for determining the location of the apex of a dental root canal wherein the apparatus allows the acquisition of more accurate data in a shorter time span. 1 to 15 weight % concentration into a poor solvent selected from the group consisting of aliphatic solvents, alicyclic solvents, aromatic solvents, CS2 and mixture of two or more these solvents and the temperature of which is adjusted to the range from \u221220\xb0 C. In certain embodiment, the adaptive node selector may include a locationorigin based filter, an event logger for logging various monitored functioning and non-functioning occurrences, and a filter for returning IP address responsive to queries for availableup interfaceslinks.