The XPT1-BA4 is a redox indicator electrode from the manufacturer Chauvin Arnoux, specifically designed for measuring the oxidation-reduction potential (ORP) in chemical solutions. It consists of a platinum wire integrated into a robust PVC housing to prevent mechanical damage and breakage. The electrode features a 4 mm banana plug as the connection, enabling a secure and reliable connection to measuring instruments. This measuring electrode, also referred to as an indicator electrode, responds to changes in the redox potential of a sample and is used in combination with a reference electrode to determine the oxidizing or reducing power of a solution.

Applications

The XPT1-BA4 is particularly suitable for highly oxidizing solutions, especially those containing chlorides. It is recommended for applications such as redox titrations, where high tightness and chemical resistance are required. The electrode is also suitable for laboratory and field measurements, where a separate measuring electrode is advantageous, for example, when the service life of the measuring electrode is significantly shorter than that of the reference electrode. This enables cost-efficient maintenance, as only the measuring electrode needs to be replaced.

Functions and Equipment in Detail

The electrode consists of a platinum rod, which serves as an inert metal for redox measurement. The platinum rod is housed in a PVC body, which protects the glass rod and increases mechanical robustness. The use of PVC ensures higher tightness compared to other models, improving reliability in aggressive chemical environments. The measuring electrode is not equipped with a temperature sensor, allowing it to focus solely on redox potential measurement.

Technology Explained Simply

The redox potential (ORP) measures the ability of a solution to accept or donate electrons, i.e., its electron activity. The measurement is performed by the potential difference between the measuring electrode and a reference electrode, which provides a constant reference potential. The measuring electrode responds to chemical changes in the sample, with the platinum rod serving as the reaction surface. The measured voltage is indicated in millivolts (mV) and allows conclusions about the oxidizing or reducing power of the solution. The electrode is designed for use in laboratory and field environments, with an operating temperature range between 0 and 80 °C.

Compatibility and Accessories

The XPT1-BA4 is equipped with a 4 mm banana plug, enabling a compatible connection to measuring instruments with the corresponding interface. It is used in combination with a reference electrode, with the selection of the reference electrode depending on the application and chemical conditions. The electrode is not specified for use in semi-solid media or the food industry, but is optimized for liquid, oxidizing solutions.

Installation and Mounting

The electrode is directly immersed into the solution to be measured. The 4 mm banana plug is inserted into the corresponding connection of the measuring instrument. No special mounting or installation is required, as the electrode is designed as a standard measuring electrode. The connection is mechanically stable and allows for easy handling.

Operational Advantages

The XPT1-BA4 offers high chemical resistance and mechanical robustness due to the PVC housing. The higher tightness compared to other models ensures reliable measurement in aggressive environments. The use of a platinum rod ensures a stable and reproducible reaction to redox changes. The separation of measuring electrode and reference electrode enables efficient maintenance and more cost-effective replacement cycles, especially when the service life of the measuring electrode is shorter than that of the reference electrode.

Protection Rating and Operating Environment

The electrode is designed for use in laboratory and field environments. The operating temperature ranges from 0 to 80 °C. The electrode is not classified as waterproof or dustproof, as it is designed for use in liquid samples and not for outdoor use or humid environments outside the laboratory. The PVC cover mechanically protects the platinum rod, but does not protect against environmental influences such as outdoor moisture.

Connection and Interface

The 4 mm banana plug enables a secure and reliable electrical connection to measuring instruments. The electrode is not equipped with a BNC plug, S7 plug, or DIN connector. The connection is made exclusively via the 4 mm banana plug, which is standard in the electrode category for redox measuring electrodes.

Service Life and Maintenance

The service life of the electrode depends on the chemical composition of the solution being measured. In highly oxidizing solutions, especially those containing chloride, the service life is shorter. The electrode is not refillable and requires replacement when worn. Maintenance is limited to cleaning the platinum surface, with no special maintenance solutions or tools required.

Recommended Applications

The electrode is specifically suitable for redox titrations and measurements in highly oxidizing solutions containing chloride. It is recommended when a separate measuring electrode is advantageous, for example, in applications where the service life of the measuring electrode is significantly shorter than that of the reference electrode. The electrode is not specified for the food industry or semi-solid media.

Compatibility with Devices

The electrode is compatible with measuring instruments that have a 4 mm banana plug as the input interface. The connection is made directly via the plug, without additional adapters or cables. The electrode is not suitable for devices with BNC plug, S7 plug, or DIN connector.