Altimeter
![Diagram showing the face of the](/Images/godic/202501/22/3-Pointer_Altimeter.svg1226.png")
![Digital barometric pressure sensor for altitude measurement in consumer electronic applications](/Images/godic/202501/22/Digital-barometric-pressure-sensor1226.jpg")
![Digital wrist-mounted skydiving altimeter in logbook mode, displaying the last recorded jump profile.](/Images/godic/202501/22/Digital_skydiving_altimeter_with_logbook1226.jpg")
![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.](/Images/godic/202501/22/Hand-mounted_skydiving_altimeter_with_analogue_display_being_used_in_free_fall1227.jpg")
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.