
1) Measuring device 2) Measuring instrument 3) Measuring system 4) Measuring instrument
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https://www.crosswordclues.com/clue/variometer

A variometer (also known as a rate of climb and descent Indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI)) is one of the flight instruments in an aircraft used to inform the pilot of the near instantaneous (rather than averaged) rate of descent or climb. It can be calibrated in knots, f...
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http://en.wikipedia.org/wiki/Variometer

instrument for measuring magnetic declination
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http://phrontistery.info/v.html

• (n.) An instrument for comparing magnetic forces, esp. in the earth`s magnetic field.
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http://thinkexist.com/dictionary/meaning/variometer/

A panel instrument, often as simple as a tiny ball in a vertical tube, indicating subtle PITCH movements of an aircraft. Popular use in SAILPLANES.
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http://www.aerofiles.com/glossary.html

(from the article `gliding`) ...familiar airplane instruments such as an altimeter, an airspeed indicator, a turn-and-bank indicator, a compass, and GPS (Global Positioning ...
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http://www.britannica.com/eb/a-z/v/8
Va`ri·om'e·ter noun [ Latin
varius various +
-meter .]
(Electricity) An instrument for comparing magnetic forces, esp. in the earth's magnetic field.
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http://www.encyclo.co.uk/webster/V/8

[
n] - a measuring instrument for measuring variations in a magnetic field
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http://www.webdictionary.co.uk/definition.php?query=variometer

An inductor whose total inductance can be varied either by altering the relative position of two coaxial coils connected in series or by the use of permeability tuning, and thus can be used to tune a circuit.
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https://www.encyclo.co.uk/local/20820
noun a measuring instrument for measuring variations in a magnetic field
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https://www.encyclo.co.uk/local/20974

(also known as a vario, rate of climb and descent indicator [RCDI], rate of climb indicator, vertical speed indicator [VSI], or vertical velocity indicator [VVI]) is one of the flight instruments in an aircraft (mostly used in sailplanes, hang gliders, paragliders, etc.) used to inform the pilot of the near instantaneous (rather than averaged) rate...
Found on
https://www.encyclo.co.uk/local/22323
No exact match found.