A barometer is a scientific instrument used in meteorology to measure atmospheric pressure. source
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure.
Barometers and pressure altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes. source
Barometers and pressure altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes.
The main exception to this is ships at sea, which can use a barometer because their elevation does not change. source
The main exception to this is ships at sea, which can use a barometer because their elevation does not change.
Due to the presence of weather systems, aircraft altimeters may need to be adjusted as they fly between regions of varying normalized atmospheric pressure. source
Due to the presence of weather systems, aircraft altimeters may need to be adjusted as they fly between regions of varying normalized atmospheric pressure.
A mercury barometer has a glass tube closed at one end with an open mercury-filled reservoir at the base. source
A mercury barometer has a glass tube closed at one end with an open mercury-filled reservoir at the base.
On June 5, 2007, a European Union directive was enacted to restrict the sale of mercury, thus effectively ending the production of new mercury barometers in Europe. source
On June 5, 2007, a European Union directive was enacted to restrict the sale of mercury, thus effectively ending the production of new mercury barometers in Europe.
Using vacuum pump oil as the working fluid in a barometer has led to the creation of the new "World's Tallest Barometer" in February 2013. source
Using vacuum pump oil as the working fluid in a barometer has led to the creation of the new "World's Tallest Barometer" in February 2013.
The barometer at Portland State University (PSU) uses doubly distilled vacuum pump oil. source
The barometer at Portland State University (PSU) uses doubly distilled vacuum pump oil.
The lowest density vacuum oil was chosen for the PSU barometer to maximize the oil column height. source
The lowest density vacuum oil was chosen for the PSU barometer to maximize the oil column height.
An aneroid barometer is an instrument for measuring pressure as a method that does not involve liquid. source
An aneroid barometer is an instrument for measuring pressure as a method that does not involve liquid.
Invented in 1844 by French scientist Lucien Vidi, the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule), source
Invented in 1844 by French scientist Lucien Vidi, the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule),
The aneroid barometer is made from an alloy of beryllium and copper. source
The aneroid barometer is made from an alloy of beryllium and copper.
Microelectromechanical systems (or MEMS) barometers are extremely small devices between 1 and 100 micrometres in size (i.e. 0.001 to 0.1 mm). source
Microelectromechanical systems (or MEMS) barometers are extremely small devices between 1 and 100 micrometres in size (i.e. 0.001 to 0.1 mm).
Typical applications include miniaturized weather stations, electronic barometers and altimeters. source
Typical applications include miniaturized weather stations, electronic barometers and altimeters.
There are many other more unusual types of barometer. source
There are many other more unusual types of barometer.
Temperature compensation of an aneroid barometer is accomplished by including a bi-metal element in the mechanical linkages. source
Temperature compensation of an aneroid barometer is accomplished by including a bi-metal element in the mechanical linkages.
Aneroid barometers sold for domestic use typically have no compensation under the assumption that they will be used within a controlled room temperature range. source
Aneroid barometers sold for domestic use typically have no compensation under the assumption that they will be used within a controlled room temperature range.
