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Built with proprietary sensor technology and materials from Switzerland, Apera LabSen 211 pH Electrode is ideal for professional lab and field pH measurement of general water solutions.

LabSen S-type hemispherical 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.

Long-Life Reference System - composed of a glass tube, AgCl, and a reference silver wire. The top end of the slim glass tube is stuffed with cotton, which prevents the reaction between AgCl and electrolyte when the temperature changes. It improves the stability of reference electrode and extends the service life of the electrode.

The electrode uses a standard 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 achieve temperature compensation.

LabSen 211 Glass-body pH Electrode for General Water Solutions

    • Proprietary sensor technology and premium materials from Switzerland
    • Built with LabSen S-type hemispherical glass membrane, featuring low resistance (fast response) and high firmness
    • No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
    • Long-Life Reference System improves the stability of reference electrode and extends the service life of the electrode
    • Compatible with TRIS buffers
    • Material: Lead-free glass

      Built-in Temperature Compensation Sensor: No

      Junction: Ceramic

      Reference: Long-Life

      Electrolyte: 3M KCL

      Length: 120mm

      Diameter: 12mm

      Membrane Shape: Half-Ball

      Membrane Resistance: <150MΩ

      Range: 0 to 14 pH

      Temp. Range: -5 to 100°C (23 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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