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Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 831 HF pH Electrode is designed for professional pH measurement of solutions containing HF (Hydrofluoric) acid, and other strong acid solutions.

LabSen HF glass membrane – designed for accurate measurement in strong acid samples, and is resistant to hydrofluoric corrosion (1g/L)

Built tough – The hemispherical glass membrane is 10 times stronger than traditional glass membranes, highly resistant to general impact, saving the electrode from accidental damage.

Silver Ion Trap Reference System - On top of the Long-Life reference system, a silver ion trap is added to further prevent junction clogs.

The electrode uses a BNC connector, compatible with any pH meters that use BNC connectors. No temperature sensor is built-in. Users need to have a separate temperature probe (ex: Apera MP500) to enable ATC or manually input temperature to realize temperature compensation.

      LabSen 831 Glass-body pH Electrode for Strong Acid Solutions and Hydrofluoric

        • Proprietary pH sensor technology and premium materials from Switzerland
        • LabSen HF glass membrane designed for accurate measurement in strong acid samples, and is resistant to hydrofluoric corrosion (1g/L)
        • Silver Ion Trap Reference System
        • LabSen's sturdy glass membrane is 10 times stronger than traditional glass membranes
        • The blue gel electrolyte eliminates the chance of any air bubbles inside the sensor
        • Material: Lead-free glass

          Temp. Sensor: No

          Junction: Ceramic

          Reference: Silver Ion Trap

          Electrolyte: 3M KCL

          Length: 120mm

          Diameter: 12mm

          Membrane Shape: Half-Ball

          Membrane Resistance: <400MΩ

          Range: 0-11 pH

          Temp. Range: 0 to 100°C (32 to 212°F)

          Connector: BNC

          Cable: 3 Ft

      • We warrant this electrode to be free from defects in material and workmanship and agree to repair or replace free of charge, at the option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS, LLC for a period of SIX MONTHS from the delivery.

        This limited warranty does NOT cover any issues due to:

        • Accidental damage
        • Improper use
        • Normal wear and tear
        • Transportation
        • Storage
        • Failure to follow the product instructions
        • Unauthorized maintenance, modifications, combination or use with any products, materials, processes, systems or other matter
        • Unauthorized repair
        • External causes such as accidents, abuse, or other actions or events beyond our reasonable control.
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