LabSen 861 pH electrode for high-temperature and caustic solutions, e.g. electroplating solutions


The LabSen® 861 pH electrode from Apera Instruments is manufactured using proprietary Swiss sensor technology and materials. It was specially developed for the measurement of high-temperature and caustic solutions, such as electroplating solutions.

LabSen PSY Glass Diaphragm – The special PHY diaphragm is highly resistant to chemical corrosion and maximizes the reliability and lifetime of the electrode when measuring complex and high temperature solutions.

Silver Ion Trap Reference System – In addition to the Long Life Reference System, a silver ion trap is incorporated into the LabSen 861 pH electrode to prevent blockage or contamination of the diaphragm by silver sulfide.

  • Patented pH sensor technology and materials from Switzerland
  • Especially for pH measurement of high-temperature solutions (up to 130°C) and alkaline solutions
  • Silver ion trap reference system prevents contamination of the electrode
  • The PTFE diaphragm prevents the connection from being clogged by complex chemicals
  • Blue gel electrolyte, does not flow and does not cause air bubbles

The electrode uses a BNC connector that is compatible with all pH meters that use BNC connectors, such as Apera Instruments PH850, PC850, PH8500, PC8500, PH700, PH910, PC910, PH950, PC950, PH800, PH800, PC800, PH820, and PC820. A temperature sensor is not integrated. For automatic temperature compensation, a separate temperature sensor (e.g. Apera Instruments MP500) is required, or the temperature must be entered manually.

This electrode has a 6-month manufacturer’s warranty.

Technical Specifications

Measuring range (1 ~ 13) pH Electrolyte Gel KCl
Recommended operating temperature (0 ~ 130) °C Storage solution 3M KCl
Membrane type PHY Membrane resistance <500 MΩ
Shank material Lead free glass Electrode dimension (Ø12×120) mm
Reference system Silver ion trap Connection BNC
Diaphragm PTFE Cable Ø3mm×1m



Compatible devices