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CLR Combined pH electrode for laboratory applications

CLR Combined pH electrode for laboratory applications

The Mod. 101L is a robust, combined pH electrode tailored for all typical laboratory applications. Featuring a highly durable glass membrane and an Ag/AgCl reference system filled with liquid electrolyte, it delivers reliable and precise measurements. Its versatile design allows for advanced customizations, including an integral temperature sensor for precise thermo-compensation or a salt bridge with various external electrolytes to suit diverse testing environments.

Key Advantages

  • Built to Last: Features a very rugged glass membrane designed for daily laboratory use.
  • Advanced Customization: Available with an integral temperature sensor (Pt100 or Pt1000) or a salt bridge with multiple external electrolyte options.
  • Convenient Maintenance: Equipped with a lateral filling hole for quick and easy electrolyte refilling.
  • Specialized Options: An increased-area porous diaphragm version is available, making it an excellent choice for fluids containing fouling substances.

Important Configuration Notes

  1. HIGH TEMP (0–130°C): Must use L2 membrane. LR membrane is only for low temperature / low conductivity applications (0–10 pH range limitation applies).
  2. INTEGRAL TEMPERATURE SENSOR (Pt100 / Pt1000): No salt bridge versions allowed. Must select standard reference configuration only.
  3. S7 SCREW CONNECTOR: No plug option required. S7 is a bare threaded connection and cannot be combined with BNC / DIN / LEMO connectors.
  4. Ø6 mm BODY VERSION: Not compatible with salt bridge configurations. Only standard body designs apply.
  5. LOW CONDUCTIVITY MEDIA: LR membrane only, restricted to low conductivity solutions and low temperature use cases.

Technical Specifications


Calibration & Care Guide

  • Storage: When not in use, keep the glass membrane inserted into the provided protection cap filled with pH 4 buffer solution. This ensures the electrode is always ready for measurement and maximizes its lifespan.
  • Rehydration: If the electrode stays dry for extended periods, immerse it in a pH 7 buffer solution for 1 hour to rehydrate the membrane.
  • Calibration: Standardize the measuring chain using standard pH 7 and pH 4 buffer solutions.

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  • Temp. Range
  • Temp. Sensor
  • Reference Electrolyte
  • Diaphragm Version
  • Electrode Body Style
  • Connection
  • Plug Type
  • Glass Membrane
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Specifications

Temp. Range Standard (5°C to 60°C), Low Temp (20°C to -30°C), High Temp (0°C to 130°C), Special Custom Temp
Temp. Sensor No Sensor, Built-in Pt100 Sensor, Built-in Pt1000 Sensor
Reference Electrolyte Standard (KCl Liquid), Salt Bridge: KCl (Liquid), Salt Bridge: KCl (Gel), Salt Bridge: KNO₃ (Liquid), Salt Bridge: KNO₃ (Gel), Salt Bridge: NaCl (Liquid), Salt Bridge: NaCl (Gel), Salt Bridge: LiCl (Non-Aqueous)
Diaphragm Version Standard (1mm Ceramic), Increased Area Porous, Nylon
Electrode Body Style Standard (12mm x 120mm), PTFE Conic Fitting NS12, PTFE Conic Fitting NS6, Slim Body (6mm)
Connection 1m Integral Cable, SS Head with Flange, 5m Integral Cable, 10m Integral Cable, 15m Integral Cable, S7 Screw Connector, S7 Screw Connector (PG13.5)
Plug Type No Plug, BNC Coaxial, DIN Standard Coaxial, LEMO Coaxial, Coaxial (12mm), Coaxial (American Type), Coaxial (For Radiometer)
Glass Membrane Standard L2 (Universal / High Temp), LR Type (Low Temp / Low Conductivity)