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Reference electrode BR42

pH measurements with separate electrodes require the use of a measurement electrode and a reference electrode. The latter will retain a constant, stable potential during the measurements.

- Calomel (Hg/Hg2Cl2) reference electrode, usually called an SCE (Saturated Calomel Electrode).
This comprises a glass tube in which a drop of mercury and mercury chloride (calomel) are placed in contact with a platinum wire. The reference element is filled with a saturated KCl solution (KCl 3 mol/L).

- Equipped with a porous ceramic junction which allows the reference electrolyte to "sweat" but prevents it from flowing freely.
- High stability over time and low temperature coefficient.
This is ideal for many applications except for those where the chloride ions might react with a compound present in the solution, as is the case with Ag+ ions with which the chloride ions form a precipitate, AgCl. In such cases, a mercurous sulphate reference electrode should be used.

The choice of the reference electrode depends above all on the experimental conditions for your measurements.

This reference electrode should be used with a measurement electrode (BV41A/H or XV41) for correct pH measurement.

- Various connection technologies are available for adaptation to all your instruments.  

For further technical details, please read the sales brochure on the electrodes and/or contact us.

Elect. Reference BR42 Verre Calomel BA2
Elect. Reference BR42 Verre Calomel BA4
Elect. Reference BR42 Verre Calomel S7

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