How do I know if my hydrometer is working?

Are you unsure if your hydrometer is functioning properly? Here's a step-by-step guide to help you verify its accuracy. First, make sure you're using the hydrometer in the right environment, as temperature and other factors can affect its readings. Next, take a sample of the liquid you're testing and place it in a clean, dry container. Lower the hydrometer into the liquid slowly and make sure it's not touching the sides or bottom of the container. Once the hydrometer has stopped moving, read the specific gravity or concentration level indicated on the scale. Compare this reading to a known value or standard to confirm the accuracy of your hydrometer. If there's a significant discrepancy, it may be time to replace your hydrometer.