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pH electrodes

pH electrodes

Make pH measurement simple – the right sensor for your application

We offer a wide range of pH electrodes for both laboratories and industry – from robust, maintenance free models to highly precise glass sensors for difficult samples. No matter if you measure in PCR plates, small sample volumes under 100 µL, process samples, or field measurements in open water, we will find the best solution for your task.

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[9040841] pH electrode, WTW SenTix 42, plastic, gel, NTC, BNC/4mm 1 m

pH electrode, WTW SenTix 42, plastic, gel, NTC, BNC/4mm 1 m [9040841] pH electrode, WTW SenTix 42, plastic, gel, NTC, BNC/4mm 1 m

[9040842] pH electrode, WTW SenTix 60, glass, S7 wo. cable

pH electrode, WTW SenTix 60, glass, S7 wo. cable [9040842] pH electrode, WTW SenTix 60, glass, S7 wo. cable

[9040843] pH electrode, WTW SenTix 62, glass, BNC 1 m

pH electrode, WTW SenTix 62, glass, BNC 1 m [9040843] pH electrode, WTW SenTix 62, glass, BNC 1 m

[9040844] pH electrode, WTW SenTix 82, glass, NTC, BNC/4mm 1 m

pH electrode, WTW SenTix 82, glass, NTC, BNC/4mm 1 m [9040844] pH electrode, WTW SenTix 82, glass, NTC, BNC/4mm 1 m

[9040851] pH electrode, WTW SenTix 20, plastic, gel, S7 wo. cable

pH electrode, WTW SenTix 20, plastic, gel, S7 wo. cable [9040851] pH electrode, WTW SenTix 20, plastic, gel, S7 wo. cable

[9040873] pH electrode, WTW SenTix 21-3, plastic, gel, DIN 3 m

pH electrode, WTW SenTix 21-3, plastic, gel, DIN 3 m [9040873] pH electrode, WTW SenTix 21-3, plastic, gel, DIN 3 m

[9040877] pH electrode, WTW SenTix 41-3, plastic, gel, NTC, DIN/4mm 3 m

pH electrode, WTW SenTix 41-3, plastic, gel, NTC, DIN/4mm 3 m [9040877] pH electrode, WTW SenTix 41-3, plastic, gel, NTC, DIN/4mm 3 m

[9041400] pH electrode, Mettler-Toledo LE438, plastic, gel, NTC, BNC/RCA 1 m

pH electrode, Mettler-Toledo LE438, plastic, gel, NTC, BNC/RCA 1 m [9041400] pH electrode, Mettler-Toledo LE438, plastic, gel, NTC, BNC/RCA 1 m

[9041450] pH electrode, Mettler-Toledo InLab Routine, glass, S7 wo. cable

pH electrode, Mettler-Toledo InLab Routine, glass, S7 wo. cable [9041450] pH electrode, Mettler-Toledo InLab Routine, glass, S7 wo. cable

[9041454] pH electrode, Mettler-Toledo InLab Routine Pro, glass, NTC, MultiPin wo. cable

pH electrode, Mettler-Toledo InLab Routine Pro, glass, NTC, MultiPin wo. cable [9041454] pH electrode, Mettler-Toledo InLab Routine Pro, glass, NTC, MultiPin wo. cable

Which pH electrode should I choose?

The correct choice depends on your sample, environment, and instrument. Consider:

  • Volume: Micro electrodes for small samples and tight containers(e.g. PCR plates and micro tubes); standard electrodes for routine measurements; surface electrodes for droplets.

  • Sample consistensy: viscous samples like honey, and harder samples like cheese or fruit, require special electrodes.

  • Material:

    • Plastic/epoxy – extra robust and user friendly.

    • Glass – high precision and stability for difficult samples.

    • PEEK – chemically resistent and durable in difficult environments.

  • Electrolyte:

    • Gel/polymer ("maintenance free") – easy in daily use or with multiple users.

    • Refillable – maximal precision and flexibility, and available with multiple diifferent junctions.

  • Diaphragm/junction: Glass, ceramic, fiber, platinum, PTFE, or open – minimize blockages and get reliable use in dirty, protein-containing, or aggressive samples.

  • ATC (automatic temperature compensation): Choose models with built-in temperature sensor when the temperature varies to achieve reproduceable results.

  • Connectors: We have variants with BNC, BNC/RCA (cinch), DIN, DIN/4 mm, S7/AS-plug and more, to ensure that your sensor fits new and old, portable or tabletop  instruments from most manufacturers.


Maintenance – prolong the lifetime

Correct storage and service is the key to stable measurements. Store your sensor in a matching storage solution (never in destilled water), calibrate regularly with buffers in the relevant range, and change the electrolyte in refillable sensors as needed. Choosing a fitting diaphragm for your sample will decrease the risk of clogging, leading to reliable use.


Brands and compatibility

We have products from WTW, Mettler-Toledo, Endress+Hauser, and LLG Labware plus consumables from these along with SI Analytics and Reagecon. The range matches both portable and desktop instruments with and without internal memory.


Why buy from us?

You get a wide range, Du får et bredt sortiment, hurtig levering fra et stort lager og adgang til rådgivning, support og service fra specialister—fra de enkle løsninger til de avancerede.

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