vacuum-type electrometer
1Electrometer — An electrometer is an electrical instrument for measuring electric charge or electrical potential difference. There are many different types, ranging from historical hand made mechanical instruments to high precision electronic devices. Modern… …
2electrometer — electrometric /i lek troh me trik/, electrometrical, adj. electrometrically, adv. electrometry, n. /i lek trom i teuhr, ee lek /, n. a calibrated device used for measuring extremely low voltages. [1945 50; ELECTRO + METER] * * * ▪ instrument… …
3mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph …
4Pressure measurement — The construction of a bourdon tube gauge, construction elements are made of brass Many techniques have been developed for the measurement of pressure and vacuum. Instruments used to measure pressure are called pressure gauges or vacuum gauges. A… …
5Hot filament ionization gauge — Infobox Laboratory equipment name = Hot filament ionization gauge caption = Bayard Alpert hot thoriated iridium filament ionization gauge on 2.75 in conflat flange acronym = other names = Hot cathode gauge Bayard Alpert gauge uses = Pressure… …
6History of electromagnetism — The history of electromagnetism, that is the human understanding and recorded use of electromagnetic forces, dates back over two thousand years ago, see Timeline of electromagnetism. The ancients must have been acquainted with the effects of… …
7Voltmeter — Demonstration voltmeter from a physics class A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. Analog voltmeters move a pointer across a scale in proportion to the voltage… …
8List of Dutch inventions and discoveries — History of the Netherlands This article is part of a series Early History …
9Museum Boerhaave — Established 1931 [1] Location Lange Sint Agnietenstraat 10 Leiden, Netherlands …
10Dutch inventions and discoveries — The Dutch people have a history and tradition in inventing and discovery. Dutch scientists and engineers have made a remarkable contribution to human progress as a whole, from something as simple as the sawmill to microbiology and artificial… …
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