Fillable combination electrode for pH measurements on small volumes. (Reference electrode + measurement electrode in the same housing) Electrode designed to measure the pH in smallrecipients and/or with small samples. It is ideal for haemolysis tubes and for any application where the small quantity of the sample makes it precious. The BRV4 electrodecan be supplied in two versions, according to the type of glass blown: either glass A or glass H. The difference between these two types of glass lies inthe properties of the glass. Glass Aallows measurements in highly alkalineenvironments and its measurement range extends from 0 to 14, whereas glass His a universal glass allowingaccurate measurements up to pH 12. The glass is the element sensitive to oxonium ions (H3O+(aq)) when the electrode is immersed in an aqueous solution, because the potentials are different on either side of the glass membrane due to the different ion exchanges between the membrane and the solution.

• Filled with a liquid electrolyte: KCl 1 mol/L

Advantages of a liquid electrolyte:

• Possibility of topping up or emptying the electrolyte in the event of contamination
• extension of the electrode's life span.

Advantages of KCl 1 mol/L:

• Less crystallization if the liquid evaporates on the membrane
• Reduced risk of clogging the junction => Extension of the electrode's life span

Spherical glass membrane termination for relatively large contact area.

Difference between the BRV4A/H and the BRV5A/H electrode: the diameter of the glass bulb of the BRV4 electrode is 6/6.5 mm.

• Various types of connection technology available for adaptation to all your instruments.

To fully meet your expectations, a range of accessories is available that is compatible with your equipment. Feel free to add them to your quote request to obtain a complete and tailored solution.