Filter Pump

A balance bathroom scale, which is a regular bathroom scale that uses a balance mechanism, is primarily designed for personal use in households. Its main purpose is to measure a person's body weight accurately.

Bar breaking apparatus is used to show the thermal expansion and contraction of metals.

A barometer tube is a slender, sealed, and typically transparent tube used in barometers to measure atmospheric pressure. It is usually filled with a liquid, often mercury, but sometimes water or another fluid, which rises or falls within the tube in response to changes in atmospheric pressure. The height of the liquid column in the tube serves as an indicator of the current atmospheric pressure, with higher pressure causing the liquid to fall and lower pressure causing it to rise. This measurement helps in predicting weather changes and understanding atmospheric conditions.