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Air bubbles that form during stirring not only affect mixing efficiency but can also skew analytical results in some laboratory applications. Learn about the causes and effective ways to minimize them

If the magnetic stir bar rotates weakly, easily swings away, or no longer creates the same swirling motion as before, has it lost its magnetism? Find out the causes, how to check, and the appropriate solutions.

Two metal detectors may have fairly similar specifications, but their field results can differ significantly. Some devices operate stably on park ground, while others exhibit significant interference when moved to red basalt soil or coastal areas

Even with the same device and the same object, the detection results are not always the same. In some areas, the signal is clearly visible from a considerable distance, while in other areas, the probe must be brought close to the ground to receive a response.

The 10 million VND price range is always among the most searched-for budgets when choosing to buy a metal detector. This is a reasonable investment to access branded equipment, while still being suitable for beginners or individual users