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Built with proprietary sensor technology and premium materials from Switzerland, Apera LabSen 221 Glass-body pH Electrode is designed for titration and low ionic strength solutions as well as general water solutions. The electrode is compatible with TRIS buffer solutions.

LabSen S-type cylindrical glass membrane - low resistance and high firmness, rendering fully stabilized readings in 15 to 30 seconds, and is yet 10 times stronger than traditional glass membranes, highly resistant to general impact, eliminating the chance of accidental breakage.

Movable Sleeve Junction - easy to clean, especially suitable for low ionic strength solutions, emulsions, and suspensions. The infiltration rate of the electrolyte can be adjusted by the tightness of the sleeve.

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 Instruments MP500) to enable ATC or manually input temperature to realize temperature compensation.

LabSen 221 Glass-body pH Electrode for Titration and Low Ionic Strength Solution

    • Built with LabSen S-type glass membrane, featuring fast response and high firmness
    • Movable Sleeve Junction - easy to clean, adjustable infiltration rate
    • Long-Life Reference System, improving the stability of the reference and extends the electrode's service life
    • No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
    • Material: Lead-free glass

      Temp. Sensor: No

      Junction: Movable Sleeve

      Reference: Long-Life

      Electrolyte: 3M KCL

      Length: 130mm

      Diameter: 12mm

      Membrane Resistance: <150MΩ

      Range: 0 to 14 pH

      Temp. Range: -5 to 80°C (23 to 176°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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