Why mercury is used in manometer?

Mercury is used in manometers for a number of reasons… 1. It has high density. Pressure is determined by measuring how high the atmospheric pressure has pushed a column of liquid. If you use water, this column will be about ten meters high. read more

There are many properties of mercury because of which we prefer it in the manometer while measuring the pressure of fluids.But the main reason is, its density is quite high as compared to that of water.So,we do not need a high column like water. read more

Mercury was used in manometers because it was the densest liquid known, 14.1 times heavier than water, allowing the manometer to be made in shorter lengths. A column of mercury can only be 33 inches long when held up by a vacuum in the end of a tube. read more