ASP2110 Plastic Shell pH Electrode

Product Detail Page: ASP2110 Plastic Shell pH Electrode

pH Measurement Principle

The ASP2110 plastic shell pH electrode operates on the principle of electrochemical methods, specifically the principle of a primary cell. A primary cell is a system that converts chemical energy into electrical energy. The voltage of this cell is known as electromotive force (EMF). The EMF is generated by two half-cells: one is the measurement half-cell, whose potential is related to the specific ion activity; the other is the reference half-cell, commonly called the reference electrode, which is generally connected to the measurement solution and the measuring instrument. The potential difference generated by the internal primary cell reaction within the electrode is transmitted to the pH controller, where the corresponding algorithm transmits and displays the pH value.

Technical Specifications of ASP2110 Plastic Shell pH Electrode

The ASP2110 industrial pH electrode features a ring-shaped PTFE liquid junction, a single liquid junction design, solid electrolyte, and a special glass sensitive membrane, enhancing the electrode's response speed and anti-pollution capability, meeting the performance standards of international similar electrodes.

Calibration of the pH Electrode

1. It is recommended to calibrate the electrode using the three-point method. Typically, start with pH4.00 buffer solution for positioning, then use pH6.86 and pH9.18 buffer solutions in sequence to determine the slope. If using the two-point method, first use pH6.86 buffer solution for positioning, then select the second standard buffer solution based on the acidity or alkalinity of the solution to be measured. For acidic solutions, use pH4 buffer solution to determine the slope; for alkaline solutions, use pH9.18 buffer solution.

2. After connecting the electrode to the instrument, allow the instrument to preheat for 30 minutes before performing calibration.

3. When calibrating the electrode, do not place it flat; it should be positioned vertically (with the electrode glass bulb facing down) to prevent the electrode mV data from deviating.

4. For electrodes with temperature compensation, switch the controller to automatic temperature compensation mode.

Usage Precautions for pH Electrodes

1. The electrode lead wire is a special shielded cable; customers are prohibited from cutting the lead wire, and any consequences arising from such actions are not the responsibility of the manufacturer.

2. Avoid long-term immersion in distilled water or protein solutions, and prevent contact with organic silicon oils.

3. For electrodes that have been in use for a long time, the glass membrane may become transparent or have deposits; in such cases, wash with dilute hydrochloric acid and rinse with water.

4. If the electrode cannot be calibrated or perform normal measurements after maintenance and care, it indicates that the electrode cannot be restored and should be replaced.

5. The pH electrode wire is not waterproof; efforts should be made to avoid contact with water.

Choose the ASP2110 plastic shell pH electrode for reliable and accurate pH measurement in a variety of industrial applications. Buy now and ensure your process quality and efficiency!

Correspondence between pH and mV

Correspondence between pH and mV at 25°C

pH/ORP Electrode Ensemble Operating Instructions

pH-ORP-Electrode-Ensemble-Operating-Instructions.pdf