Chauvin Arnoux BR41-S7 BR41 pH and redox reference electrode with S7 plug content_copy

The BR41-S7 is a reference electrode made of silver, developed by Chauvin Arnoux for pH and redox measurements. It serves as a reference electrode in systems with separate electrodes, providing a constant and stable potential during measurement. The electrode is specifically designed for use with measuring electrodes such as BV41A/H or XV41 to enable precise pH value measurements. Its glass body contains a silver wire partially coated with an AgCl film, immersed in a KCl solution with a concentration of 1 mol/l. This electrolyte concentration ensures minimal crystallization due to evaporation at the membrane and reduces the risk of diaphragm contamination, thereby extending the electrode's service life.

Applications

The BR41-S7 is suitable for pH and redox measurements in laboratory and field applications. It is particularly suitable for measurements at higher temperatures, as the porous ceramic diaphragm remains stable even at temperatures above 60 °C. The electrode is used in applications where a clear separation between measuring electrode and reference electrode is required, such as in educational settings for teaching purposes or when different electrode lifespans need to be considered.

Functions and Equipment in Detail

The electrode features a porous diaphragm made of ceramic, enabling simple and reliable use. The reference system is based on silver/silver chloride (Ag/AgCl), ensuring high stability of the potential. The reference electrolyte solution is refillable and consists of KCl 1 mol/l. The electrode is equipped with an S7 connector, designed for connection to compatible measuring devices. The cable length is 1 meter.

Technology Explained Simply

In pH measurements, the potential difference between the measuring electrode (which reacts to hydronium ions) and the reference electrode (which provides a constant potential) is measured. The measuring device converts this difference into a pH value. The BR41-S7 ensures that the reference potential remains stable, which is crucial for accurate measurement results. The ceramic diaphragm allows controlled diffusion of the electrolyte solution, preventing measurement interference from uncontrolled fluid loss.

Compatibility and Accessories

The BR41-S7 is intended for use with measuring electrodes of type BV41A/H or XV41. Available accessories include solutions such as KCl 1 mol/L in 30 mL and a pepsin/HCl solution in 125 mL. These solutions are used for calibration and maintenance of the electrode. The electrode does not include a temperature sensor.

Mounting and Installation

The electrode is connected to the measuring device via the S7 connector. Mounting is done by screwing the connector onto the device. The cable length of 1 meter allows for flexible positioning. The electrode is designed for operating temperatures from 0 to 80 °C.

Advantages in Operation

The use of KCl 1 mol/l as the reference electrolyte reduces crystallization at the membrane and minimizes the risk of diaphragm contamination. This leads to a longer service life and more reliable measurement results. The ceramic diaphragm is robust and suitable for measurements at elevated temperatures. The S7 connector ensures a secure and easy connection to compatible devices.

General
Reference electrolyte refillable

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