Use this reference solution to properly care for pH sensors (standalone or combination pH/ORP).
Use for pH sensors 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.
- 60-mL bottle of reference filling solution