How many types of barometer are there? (FAQ - Pressure)
Some barometer measurement principles are listed below; there are bound to be others:
| Barometer measurement principles | ||
| Moving element | Parameter altered by pressure change | Measurement method |
| Mercury column | Length of mercury column | Mechanical scale and vernier |
| Capsule/bellows | Capsule length Force on quartz crystal |
Micrometer Frequency counter |
| Helical quartz Bourdon tube | Rotary position of mirror on end of tube Current required to hold mirror on end of tube to null position |
Count rotations of a worm gear Voltage across a series resistor |
| Vibrating cylinder | Resonant frequency of cylinder | Frequency counter |
| Vibrating crystal | Resonant frequency of diaphragm in single-crystal diaphragm/resonator | Frequency counter |
| Metal diaphragm | Electrical capacitance between diaphragm and fixed plate | Capacitance AC bridge circuit |
| Other diaphragms | Resistance of bonded strain gauge | Resistance bridge |
Last Updated: 25 Mar 2010
Created: 9 Aug 2007