The LRV7-BNC pH combination electrode from Chauvin Arnoux is a single-junction measuring system for pH measurement, specifically designed for applications in the food industry. The device combines the measuring electrode and reference electrode in a single housing made of PVC, ensuring a compact and easy-to-handle design. The electrode features a tapered glass tip, which facilitates measurement in semi-solid samples such as cheese. The BNC connector enables a secure and standardized connection to pH meters. The electrode is equipped with a fixed polymer electrolyte, eliminating the need for refilling and ensuring it is always ready for use. This reduces electrode contamination and enhances the reliability of measurement results in daily operation.

Applications
The LRV7-BNC is suitable for measuring pH values in semi-solid and liquid media, particularly in the food industry. The tapered shape of the electrode enables precise insertion measurements in viscous or semi-solid substances, such as those encountered during the production of cheese, yoghurt, or other fermented products. The electrode is designed for use in laboratory and production environments where quick and reliable pH analysis is required.

Functions and Features in Detail
The electrode operates as a combined single-junction measuring system, where the measuring electrode consists of a glass membrane that reacts to hydronium ions, and the reference electrode provides a constant reference potential. The potential difference between the two is converted by the measuring device into a pH value. The open ceramic diaphragm ensures direct contact between the reference electrolyte and the environment, enabled by the fixed polymer electrolyte. This reduces the risk of blockages and associated measurement errors. The electrode is designed for an operating temperature range of 0 to 80 °C.

Technology Explained Simply
The pH measurement is performed by the reaction of the glass membrane with hydrogen ions in the sample. The resulting voltage is compared with the constant potential of the reference electrode. The difference is measured in mV and then converted into a pH value. The combination of both electrodes in a single housing (single-junction measuring system) simplifies handling and reduces the number of required connections. The PVC housing is robust and chemical-resistant, while the polymer electrolyte eliminates the need for refilling.

Compatibility and Accessories
The electrode is equipped with a BNC connector, which is standard in pH meters. Compatible accessories, such as the Pepsin/HCl solution (125 ml), are available and serve for calibration or maintenance of the electrode.

Installation and Mounting
The electrode is directly immersed into the sample to be measured. The BNC connector is plugged into the corresponding measuring device. The electrode is designed for use in laboratory and production environments and requires no special mounting. The cable length is 1 meter, providing sufficient reach for most application scenarios.

Operational Advantages
The LRV7-BNC offers high reliability due to the fixed polymer electrolyte, which requires no refilling. The open ceramic diaphragm minimizes blockages and associated measurement errors. The tapered glass tip enables precise measurements in semi-solid samples. The single-junction design simplifies handling and reduces the number of required components. The electrode is specifically designed for use in the food industry, meeting requirements for hygiene and accuracy.