General
Peak diameter	6,5 mm

The BRV4H-S7-130 is a combined electrode for pH measurements, developed by Chauvin Arnoux. It serves as a pH single-rod measuring chain and is specifically designed for the analysis of samples with low volume. The electrode features a glass body and a microtip with a diameter of 6.5 mm, enabling precise measurement in small sample spaces. The S7 connector ensures a secure and standardized connection to compatible measuring devices. The total length of the electrode is 130 mm, making it suitable for applications in confined spaces or where space is limited. The ceramic junction ensures reliable ion conduction and contributes to the stability of measurement results.

Applications
The electrode is suitable for applications where only small sample quantities are available, for example in laboratory analysis, the food industry, or environmental monitoring. The microtip allows precise positioning within the sample, thus avoiding measurement errors caused by insufficient contact area. The combination of glass body and ceramic junction ensures high chemical resistance against many solvents and pH values within the typical measurement range.

Functions and Equipment in Detail
The BRV4H-S7-130 is a combined electrode, integrating both the measuring and reference electrode in a single housing. This reduces installation complexity and increases measurement accuracy, as both elements are located close to each other. The microtip with a 6.5 mm diameter enables precise measurement in small samples without altering or consuming the sample. The ceramic junction ensures uniform ion conduction and prevents contamination from porous materials. The S7 connector is a standardized interface format compatible with many pH measuring devices.

Technology Explained Simply
The electrode operates based on the principle of pH measurement using a glass electrode, which responds to changes in ion concentration in the sample. The glass body surface forms a selective membrane that allows only protons (H⁺ ions) to pass through. The resulting voltage is transmitted to the measuring device via the S7 connector. The ceramic junction acts as an ion exchange point, stabilizing the reference voltage. The microtip reduces the required sample volume and enables measurements in confined spaces, for example in microtiter plates or small test tubes.

Compatibility and Accessories
The electrode is compatible with devices that use an S7 connector as the interface. This includes many pH measuring devices from Chauvin Arnoux as well as other manufacturers supporting the S7 format. The electrode is not supplied with additional components such as calibration solutions, protective caps, or calibration aids.

Installation and Mounting
Installation is performed by simply inserting the S7 connector into the corresponding socket on the measuring device. The electrode is directly immersed into the sample, ensuring the microtip is fully submerged in the liquid. It is recommended to calibrate the electrode before first use and after prolonged storage to avoid measurement errors. The electrode is not designed for use with aggressive chemicals or high temperatures, unless specified in the respective device manual.

Operational Advantages
The combination of microtip, glass body, and S7 connector enables precise, reliable, and fast pH measurement in small samples. The compact design reduces space requirements and is suitable for mobile or stationary applications. The standardization of the S7 interface facilitates integration into existing measurement systems. The electrode requires no additional mounting components, simplifying handling.