indicating needle
1needle — 1. noun /ˈniː.dl/ a) A long, thin, sharp implement usually for piercing such as sewing, or knitting, acupuncture, tattooing …
2Magnetic needle — Magnetic Mag*net ic, Magnetical Mag*net ic*al, a. [L. magneticus: cf. F. magn[ e]tique.] 1. Pertaining to the magnet; possessing the properties of the magnet, or corresponding properties; as, a magnetic bar of iron; a magnetic needle. [1913… …
3dipping needle — variant of dip needle * * * dipping needle, a magnetic needle mounted so as to be capable of moving freely in a vertical plane about its center of gravity, and indicating by its dip the direction of the earth s magnetism; dip needle. See also… …
4galvanometer — /gal veuh nom i teuhr/, n. an instrument for detecting the existence of small electric currents and determining their strength. [1795 1805; GALVANO + METER] * * * Instrument for measuring small electric currents by deflection of a moving coil. A… …
5Pressure 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… …
6Bi-metallic strip — A bi metallic strip is used to convert a temperature change into mechanical displacement. The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper. The strips are joined… …
7barometer — barometric /bar euh me trik/, barometrical, adj. barometrically, adv. /beuh rom i teuhr/, n. 1. Meteorol. any instrument that measures atmospheric pressure. Cf. aneroid barometer, mercury barometer. 2. anything that indicates changes …
8Buddy check — The buddy check is a procedure carried out by SCUBA divers using the buddy system where each diver checks that the other s diving equipment is configured and functioning correctly just before the start of the dive. [Sport Diving, p118,123,… …
9Otto Julius Zobel — Born October 20, 1887(1887 10 20) Ripon, Wisconsin Died January 1970 (age 82) Morristown, New Jersey …
10Compass — This article is about the direction finding instrument used in navigation. For other uses, see Compass (disambiguation). A simple dry magnetic pocket compass …
