Knowledge Base

Here you will find a list of frequently asked technical questions.
If you would like more information about our products and their features, please contact us using our contact form.

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Questions and answers

To ensure our customers can easily get started with fluid analysis, we have developed a support page. There you will find descriptions of the parameters and questions from other customers. You can also ask questions about this yourself. At the moment this support page is only available in English – we are currently working on a German version.

To support
  • Measure pH value

    Measure pH value

    Measuring pH Made Easy: Test Strips vs. pH Meters, the Right Procedure in 5 Steps, and the Most Common Mistakes When Taking Measurements.

  • What is the pH value?

    What is the pH value?

    The pH level indicates whether a liquid is acidic, neutral, or alkaline. Learn what it means, how it is measured, and why it is so important.

  • What is called a “double junction” ?

    What is called a “double junction” ?

    Double-Junction Electrodes Explained: Structure, Differences from Standard Electrodes, and When They’re Really Worth Using. Includes an overview of compatible Apera electrodes.

  • What is the oxidation-reduction potential (ORP)?

    What is the oxidation-reduction potential (ORP)?

    ORP and Redox Potential Explained: What the Value Means, How Oxidizing and Reducing Environments Differ, and Where ORP Is Used in Water Treatment, Aquaculture, and Industry

  • What is dissolved oxygen (DO)?

    What is dissolved oxygen (DO)?

    Dissolved Oxygen (DO) Explained: Definition, influencing factors, typical values, and a comparison of all measurement methods. Membrane sensors vs. optical sensors, and when each method is appropriate.

  • How do I measure the conductivity ?

    How do I measure the conductivity ?

    Measuring conductivity made easy: What the EC value means, what factors influence it, how calibration works, and what typical values can be expected in practice.

  • How do I measure the ORP value?

    How do I measure the ORP value?

    Measuring ORP Made Easy: How to Assemble an ORP Sensor, Proper Procedure, Standard Solutions, and Typical Values for Swimming Pools, Aquaculture, and Drinking Water.