Air pressure (P)
The air pressure of any place in the earth’s atmosphere is the pressure of the air, existing at this place. It indicates the weight power of the air column standing above a surface or body.
We recommend various air pressure measuring techniques and the appropriate Thies CLIMA product,air pressure
We recommend various air pressure measuring techniques and the appropriate Thies CLIMA product,air pressure
Barometer
Is a measuring instrument for determination (display) of air pressure, and is used in a variety of different forms and types mostly in the field of meteorology.
We recommend various air pressure measuring techniques and the appropriate Thies CLIMA product, barometer/transmitter
We recommend various air pressure measuring techniques and the appropriate Thies CLIMA product, barometer/transmitter
Barometric Unit
Unit of the air pressure is the Pascal.
As the air pressure on sea level is, on average, 101325 Pa, thus approx. 100000 Pa, it is given mostly by the number about 1000 in hectopascal (1013.25 hPa) or by the same numerical value millibar (mbar). The air pressure is mostly measured through a barometer, where often obsolete units are used. Here is: 1 hPa = 1 mar = 0.75 Torr (= mm Hg or millimeter mercury column).
As the air pressure on sea level is, on average, 101325 Pa, thus approx. 100000 Pa, it is given mostly by the number about 1000 in hectopascal (1013.25 hPa) or by the same numerical value millibar (mbar). The air pressure is mostly measured through a barometer, where often obsolete units are used. Here is: 1 hPa = 1 mar = 0.75 Torr (= mm Hg or millimeter mercury column).
QFF
QFF is the current air pressure at the measuring site (for ex. aerodrome/airport), reduced to the sea level. It is used in the field of meteorology in order to compare the air pressures of different places at different heights.
The calculation is carried out with ASL (altitude above sea level) and data of the “current atmosphere” (pressure, temperature, and humidity).
The calculation is carried out with ASL (altitude above sea level) and data of the “current atmosphere” (pressure, temperature, and humidity).
QNH
The abbreviation QNH means the air pressure at the measuring station, reduced to sea level acc. to “standard atmosphere”.
It serves for setting an altimeter which displays the flight altitude above sea level. After landing of the aircraft, the altimeter displays the altitude of site above sea level.
It serves for setting an altimeter which displays the flight altitude above sea level. After landing of the aircraft, the altimeter displays the altitude of site above sea level.
Air pressure measuring
We recommend various air pressure measuring techniques and the appropriate Thies CLIMA product, air pressure and barometer/transmitter
Read more about air pressure measuring:Thies CLIMA industrial concepts about air pressure and particulate matter
Read more about air pressure measuring:Thies CLIMA industrial concepts about air pressure and particulate matter