Ensuring Accuracy: The Importance of Zero Oxygen Solution Calibration for Dissolved Oxygen Meters


Dissolved Oxygen meters are essential tools in the world of scientific research, ensuring accurate measurements of oxygen levels in various liquids. Calibration of these instruments is a critical step to guarantee reliable results. In this blog post, we will delve into the significance of zero oxygen solution calibration and provide a step-by-step guide on how to prepare it correctly.

What is a Zero Oxygen Solution?

A zero oxygen solution serves as a reference point for calibrating Dissolved Oxygen meters. It is a solution that contains no dissolved oxygen, creating a baseline for accurate readings. Calibration using a freshly prepared zero oxygen solution is crucial to maintain the precision of your instrument.

How to Prepare Zero Oxygen Solution:

Materials Needed:

  1. Deionized water
  2. Sodium sulfite (Na2SO3)
  3. Galaxy MS-300 Magnetic Stirrer
  4. Galaxy PG-300 Precision Weighing Balance

Step 1: Weighing Sodium Sulfite (Na2SO3)

Using the PG-300 Precision Weighing Balance, accurately measure the required amount of sodium sulfite. This step ensures the correct concentration of the solution, contributing to the accuracy of the calibration process.

Step 2: Mixing Sodium Sulfite with Deionized Water

Add the measured sodium sulfite to a container with deionized water. Utilize the Galaxy MS-300 Magnetic Stirrer to create a homogeneous mixture. The magnetic stirrer ensures even distribution of sodium sulfite in the solution, enhancing the consistency required for precise calibration.

Step 3: Verification and Calibration

Before calibrating your Dissolved Oxygen meter, allow the solution to stabilize. Perform the calibration using the freshly prepared zero oxygen solution, following the Galaxy DO-980 Dissolved Oxygen meter’s instruction manual.


Achieving accurate measurements with your Dissolved Oxygen meter starts with a precisely prepared zero oxygen solution. By incorporating the Galaxy MS-300 Magnetic Stirrer and PG-300 Precision Weighing Balance into the preparation process, you enhance the overall reliability and consistency of your calibration, ultimately contributing to the success of your scientific endeavors.