Apera Instruments Manuals & User Guides

אפרה מכשירים is a leading manufacturer of electrochemical sensors and scientific instruments, established in 1991. Dedicated to providing reliable and affordable testing solutions, the company produces a wide range of meters for measuring pH, oxidation-reduction potential (ORP), conductivity, TDS, salinity, dissolved oxygen, and turbidity. With over 30 years of industry experience, Apera Instruments operates R&D and manufacturing facilities certified to ISO 9001:2015 standards, ensuring strict quality control and continuous innovation.

The brand is well-known for its pocket-sized testers, such as the popular PH60 series, as well as portable and benchtop meters designed for agriculture, hydroponics, environmental monitoring, and food processing. Apera also integrates modern technology into its products, offering smart meters compatible with the ZenTest® mobile app for data management and analysis via Bluetooth. Headquartered in Columbus, Ohio for the US market and Wuppertal, Germany for Europe, Apera Instruments provides global support and expertise in water analysis.

• How often should I calibrate my Apera pH meter?

  For high-accuracy measurements (≤ ±0.02 pH), calibrate the electrode before every test session. For general use (≥ ±0.1 pH), calibration every 1-2 weeks is usually sufficient. Calibration is also required if the electrode has not been used for a long time or after measuring strong acids/bases.

• How should I store the pH electrode when not in use?

  Add a few drops of 3M KCL soaking solution (SKU: AI1107) to the protective cap and close it tight. Never store the electrode in distilled, RO, or deionized water, as this will damage the sensor sensitivity.

• What do I do if I see white crystals around the probe cap?

  White crystals are normal and indicate the presence of the 3M KCL storage solution, which crystallizes over time. These are not poisonous; simply rinse them off with water before using the tester.

• Why is my pH reading unstable or slow to stabilize?

  Unstable readings often occur when measuring pure water (distilled/RO) due to low conductivity. Adding a specialized ionic strength adjuster or using a specialized electrode (like LabSen 803) helps. Also, ensure the glass bulb is clean and hydrated in 3M KCL solution.

• How do I clean the electrode sensor?

  For general contaminants, rinse with distilled water. for oil/fat deposits, use warm water with dish soap (soak for 5-10 mins). For protein buildup, use the Apera Electrode Cleaning Solution (AI1166). Always rehydrate in KCL solution for 12 hours after rigorous cleaning.