The BR44-BA2 is a Dual-Junction Reference Electrode from manufacturer Chauvin Arnoux, specifically designed for redox potential measurements and argentometric dosing. It serves as a reference electrode in systems with separate electrodes, where a measuring electrode and a reference electrode are combined to measure the potential difference in millivolts (mV). The electrode features a glass body and is equipped with an Ag/AgCl reference system, ensuring a constant and stable potential during measurement. Connection is made via a banana plug with 2 mm diameter, providing a secure connection to compatible measuring devices.

Applications
The BR44-BA2 is particularly suitable for applications where samples are adhering or difficult to access, as well as for measurements in solutions interacting with potassium chloride (KCl) or potassium nitrate (KNO₃). It is commonly used in analytical chemistry, laboratory environments, and process monitoring, where high stability and long-term reliability of the reference electrode are required. The electrode is designed for use within a temperature range of 0 to 80 °C, making it suitable for a wide range of laboratory and field conditions.

Functions and Features in Detail
A central feature of the BR44-BA2 is the dual-junction system. Only one of the two diaphragms is in direct contact with the sample being measured. The inner tube contains a solution of KCl 1 mol/l, while the outer tube is filled with KNO₃ 1 mol/l. This design effectively protects the reference element from contamination, as potassium nitrate, unlike potassium chloride, does not react with many ions. This significantly reduces contamination risk and expands the electrode’s range of applications.

Technology Explained Simply
The reference electrode provides a constant reference potential that serves as a baseline for the measuring electrode. The measuring electrode responds to ion concentration in the sample and generates a voltage proportional to hydrogen ion activity (in pH measurements) or electron activity (in redox measurements). The measuring device detects the difference between the two potentials and converts it into a measurable value. The BR44-BA2 is designed for redox measurement, where the ability of a solution to accept or donate electrons is determined. The use of a dual junction ensures improved chemical stability and a longer electrode lifespan, especially in complex or aggressive media.

Compatibility and Accessories
The BR44-BA2 is equipped with a banana plug 2 mm, suitable for a wide range of measuring devices. As compatible accessories, a Pepsin/HCl solution (125 ml) is offered, which can be used for maintenance and cleaning of the electrode. The electrode is intended for use with separate measuring electrodes, and combining it with an appropriate measuring electrode is necessary for accurate measurement.

Mounting and Installation
The electrode is immersed directly into the solution to be measured. Installation requires no special tools or additional components. Connection to the measuring device is made via the banana plug. The electrode is refillable, and maintenance and refilling should be performed according to the manufacturer’s instructions to maintain performance.

Operational Advantages
The BR44-BA2 offers high chemical stability due to the dual-junction system, extending the electrode’s lifespan and reducing the need for frequent maintenance. The use of KNO₃ in the outer tube expands the range of applications, especially for samples that could react with KCl. The constant potential stability ensures reliable and reproducible measurement results, which is crucial for precise analysis in laboratory and production environments. The electrode is designed for use within a temperature range of 0 to 80 °C, ensuring broad applicability.