====== Altimeter ======
{{wst>image_cl|Favre-Leuba|Bivouac 9000|Favre-Leuba Bivouac 9000 with **altimeter**}}

An **altimeter** is a non-time [[tool watch]] [[complication]] that displays the altitude of a watch above sea level.

===== Overview =====
An altimeter is a mechanical device that uses barometric pressure to display altitude on a calibrated scale. Most use a sealed drum with a geared hand. Because barometric pressure can change over time, an altimeter must be set at a known altitude before being used and must be re-set daily. Altimeters have a maximum altitude specification varying from 4,000 to over 30,000 meters.

This complication is often used in [[pilot's watch]]es or [[field watch]]es and is similar to the [[depth meter]] found on some [[dive watch]]es.

===== Examples =====
  * [[Oris]] [[Oris Big Crown ProPilot Altimeter|Big Crown ProPilot Altimeter]] ([[2014]]) - 15,000 ft
  * [[Favre Leuba]] [[Favre-Leuba Bivouac 9000|Bivouac 9000]] ([[2018]]) - 9,000 m
  * [[Citizen]] [[Citizen Promaster Altichron|Promaster Altichron]] ([[2018]]) - 32,000 ft
  * [[Bremont]] [[Bremont U-22|U-22]] ([[2015]]) - 100,000 ft

===== See Also =====
  * [[Tool watch]]
  * [[Depth meter]]


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