Altimeter vs. Barometer — What's the Difference?

An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level. The measurement of altitude is called altimetry, which is related to the term bathymetry, the measurement of depth under water.

A barometer is a scientific instrument that is used to measure air pressure in a certain environment. Pressure tendency can forecast short term changes in the weather.

An instrument for determining elevation, especially an aneroid barometer used in aircraft that senses pressure changes accompanying changes in altitude.

An instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude.

An apparatus for measuring altitude.

An instrument for measuring atmospheric pressure, used especially in weather forecasting.

An instrument for taking altitudes, as a quadrant, sextant, etc.

Something that registers or responds to fluctuations; an indicator

An instrument that measures the height above ground; used in navigation

An instrument for measuring atmospheric pressure.

Anything used as a gauge or indicator.

An instrument for determining the weight or pressure of the atmosphere, and hence for judging of the probable changes of weather, or for ascertaining the height of any ascent.

An instrument that measures atmospheric pressure