LabSen® 241-180 pH Electrode User Manual

Introduction

Apera Instruments LabSen® pH electrodes are built with proprietary sensor technologies and key components from Switzerland. The LabSen 241-180 Micro pH electrode is designed for testing the pH level of micro samples (≥50µL) in small and deep containers such as NMR tubes.

1. Features

• Proprietary LabSen® micro cylindrical sensor tip (180mm), designed for micro-volume pH measurement in slim and deep containers.
• Blue gel inner solution - does not flow and will not cause air bubbles.
• Long life reference system with better stability and longer service life.
• The low membrane resistance increases response speed and measurement stability.

2. Technical Data

3. Usage and Maintenance

1. The measuring tip of the electrode is only 3mm. Please handle with care in case of breakage.
2. Unplug the blue rubber plug before using to maintain the pressure of the reference solution, keeping a consistent flow rate of reference solution and stable potentials of the junction. After using, plug it back.
3. Before measuring, unscrew the bottle cap, pull out the electrode, and rinse it with deionized water. After using, put the electrode back into the storage bottle and screw tight the cap. When not in use, the electrode should be soaked in the storage bottle containing 3M KCL soaking solution to keep the glass membrane and junction in a healthy condition. Clean the bottle and replace the soaking solution if it gets contaminated. The electrode should never be stored in pure water such as deionized or distilled water.
4. Perform at least a two-point calibration before measuring after connecting the new electrode to your pH meter.
5. The reference solution will run low as you use the electrode. Whenever the solution level falls to 1/2 height of the electrode, add 3M KCL solution to the refilling hole using a syringe or pipette.
6. After using, put the electrode back into the storage bottle, twist on the bottle cap, and plug in the refilling hole.
7. The connector of the electrode should be kept clean and dry. If contaminated, please clean it with medical cotton and isopropyl alcohol and blow-dry it to prevent short circuit of the electrode or slow response of the electrode.
8. pH electrodes don't last forever. Every pH electrode will eventually age and fail even if you don't use it that often. The typical service life of Apera pH electrodes is 12-24 months depending on the frequency of usage and how well you keep it clean and properly stored. Apera Instruments recommends replacing your electrode at least every 12-18 months to ensure the best accuracy.

4. Limited Warranty

Apera Instruments warrants this electrode to be free from defects in material and workmanship. Apera Instruments agrees to repair or replace, free of charge, any malfunctioned or damaged product attributable to the responsibility of APERA INSTRUMENTS (Europe) GmbH for a period of six months. The warranty period is the time limit to provide free service for products purchased by customers, not the service life of the tester or electrodes.

This limited warranty does not cover any damages due to:

• Transportation;
• Storage;
• Improper use;
• Failure to follow the product instructions or to perform any preventive maintenance;
• Modifications;
• Combination or use with any products, materials, processes, systems, or other matter not provided or authorized in writing by Apera Instruments;
• Unauthorized repair;
• Normal wear and tear; or
• External causes such as accidents, abuse, or other actions or events beyond Apera Instruments' reasonable control.

Contact Information

APERA INSTRUMENTS (Europe) GmbH
Wilhelm-Muthmann-Str. 18
42329 Wuppertal Germany
Tel.: +49 202 51988998
Email: info@aperainst.de
Website: www.aperainst.de