Barometer
Videos
A barometer is a scientific instrument that is used to measure air pressure. Pressure tendency, which is derived from barometric readings, can forecast short term changes in the weather. Many measurem
An analog barometer
Siphon
Gasparo Berti's experiment
Evangelista Torricelli
Pressure altimeter
Videos
Altitude can be determined by the measurement of atmospheric pressure. The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate alt
Barometer
…measurements of air pressure are used within surface weather analysis to help find surface troughs, pressure systems and frontal boundaries. Barometers and pressure altimeters (the most basic and common type of altimeter) are essentially the same instrument, but used for different purposes. A pressure altimeter is used to…
Digital barometric pressure sensor for altitude measurement in consumer electronic applications
Digital wrist-mounted skydiving altimeter in logbook mode, displaying the last recorded jump profile
Skydiver in free fall, making use of a hand-mounted altimeter. The analogue face is visible, showing colour-coded decision altitudes. The depicted altimeter is electronic, despite using an analogue display.
Speaking altimeter with helmet for skydiving