1 Answer
Lead is used in a hydrometer because it is a dense material, which helps provide the necessary weight to make the hydrometer float in liquids. The hydrometer is designed to measure the specific gravity (or density) of liquids.
For the hydrometer to function correctly, it needs to float at a certain level in the liquid being tested. The more dense the liquid, the higher the hydrometer will float. The added weight of lead in the bottom part of the hydrometer ensures that it stays upright and doesn't tip over, making the measurement more accurate.
By using lead, the hydrometer can be calibrated to give precise readings in different liquids, such as water, alcohol, or battery acid.
For the hydrometer to function correctly, it needs to float at a certain level in the liquid being tested. The more dense the liquid, the higher the hydrometer will float. The added weight of lead in the bottom part of the hydrometer ensures that it stays upright and doesn't tip over, making the measurement more accurate.
By using lead, the hydrometer can be calibrated to give precise readings in different liquids, such as water, alcohol, or battery acid.