What are thee 2 types of baramters?

The two main types of barometers are Mercury barometers and aneroid barometers. Mercury barometers use a column of mercury in a glass tube to measure atmospheric pressure, while aneroid barometers use a sealed metal chamber that expands and contracts with pressure changes. Both types are used to predict weather changes, with mercury barometers being more precise and aneroid barometers being more portable and durable.