Apera Instruments designs and manufactures precision electrochemical sensors and meters for water analysis, including pH, conductivity, TDS, and dissolved oxygen testers.
Apera Instruments is a leading manufacturer of scientific instruments and sensors dedicated to water analysis and electrochemical measurement. Since 1991, the company has focused on developing reliable, accurate, and affordable solutions for measuring parameters such as pH, ORP (Oxidation-Reduction Potential), conductivity, TDS (Total Dissolved Solids), salinity, dissolved oxygen, and turbidity.
Headquartered in Columbus, Ohio, with operational centers in Europe and Asia, Apera Instruments serves a global market ranging from laboratory research and biopharmaceuticals to agriculture, hydroponics, pool maintenance, and environmental monitoring. The brand is known for its proprietary sensor technologies, including the LabSen® glass membrane series, which ensures professional-grade performance.
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For high-accuracy measurements (≤ ±0.02 pH), calibrate the electrode before every test. For general use, calibrating every 1-2 weeks is typically sufficient.
Always store the pH electrode in the provided storage vial containing 3M KCl soaking solution. Never store the electrode in pure water (distilled, deionized, or RO water) as it will damage the sensor sensitivity.
Unstable readings are often caused by air bubbles in the sensor bulb or a dirty junction. Shake the electrode downward to remove bubbles, or clean the electrode with appropriate cleaning solution and soak in 3M KCl for rehydration.
The typical service life of a pH electrode is 12–24 months, depending on frequency of use and maintenance. Electrodes are consumables and should be replaced when they can no longer be calibrated successfully.