In-Situ - pH Filling Solution

Use this pH Filling Solution to properly care for pH sensors (standalone or combination pH/ORP) installed on: TROLL 9500 Multiparameter Sondes, smarTROLL Multiparameter Handhelds, Aqua TROLL 400 Instruments. It’s time to replace your reference junctions when the sensor fails to calibrate with a reasonable slope and offset, even after replacing the filling solution. Acceptable slope and offset ranges vary by instrument, so please refer to your instrument manual.