d'Arsonval movement

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• Ammeter — Amperemeter redirects here. For the unit of measurement, see Ampere meter. Demonstration model of a moving iron ammeter. As the current through the coil increases, the plunger is drawn further into the coil and the pointer deflects to the right …   Wikipedia

• Torsion spring — A mousetrap powered by a helical torsion spring A torsion spring is a spring that works by torsion or twisting; that is, a flexible elastic object that stores mechanical energy when it is twisted. The amount of force (actually torque) it exerts… …   Wikipedia

• Solenoid voltmeter — A solenoid voltmeter is a specific type of voltmeter used by electricians in the testing of electrical power circuits. Wiggy is the registered trademark for a common solenoid voltmeter used in North America and manufactured by Square D, derived… …   Wikipedia

• ammeter — /am mee teuhr/, n. Elect. an instrument for measuring current in amperes. [1880 85; AM(PERE) + METER] * * * ▪ measurement instrument       instrument for measuring either direct or alternating electric current, in amperes. An ammeter can measure… …   Universalium

• Galvanometer — D Arsonval/Weston galvanometer movement with the moving coil shown in red. A galvanometer is a type of ammeter: an instrument for detecting and measuring electric current. It is an analog electromechanical transducer that produces a rotary… …   Wikipedia

• Multimeter — A digital multimeter A multimeter or a multitester, also known as a VOM (Volt Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter may include features such as the ability …   Wikipedia

• galvanometer — /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… …   Universalium

• SWR meter — The SWR meter or VSWR (voltage standing wave ratio) meter measures the standing wave ratio in a transmission line. This is an item of radio equipment used to check the quality of the match between the antenna and the transmission line.The VSWR… …   Wikipedia