tube voltmeter
51Museum Boerhaave — Established 1931 [1] Location Lange Sint Agnietenstraat 10 Leiden, Netherlands …
52Electrochemistry — is a branch of chemistry that studies chemical reactions which take place in a solution at the interface of an electron conductor (a metal or a semiconductor) and an ionic conductor (the electrolyte), and which involve electron transfer between… …
53Galvanometer — 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… …
54Ohmmeter — An ohmmeter An ohmmeter is an electrical instrument that measures electrical resistance, the opposition to an electric current. Micro ohmmeters (microhmmeter or microohmmeter) make low resistance measurements. Megohmmeters (aka megaohmmeter or in …
55Sensor — For other uses, see Sensor (disambiguation). Sensors redirects here. For other uses, see Sensors (disambiguation). Detector redirects here. For other uses, see Detector (disambiguation). Thermocouple sensor for high temperature measurement A… …
56Spectrum analyzer — A spectrum analyzer Spectrum analyzer display A spectrum analyzer measures the magnitude of an input signal versus frequency with …
57Silver chloride electrode — A silver chloride electrode is a type of reference electrode, commonly used in electrochemical measurements. For example, it is usually the internal reference electrode in pH meters. As another example, the silver chloride electrode is the most… …
58Microwave power meter — A microwave power meter is an instrument which measures the electrical power at microwave frequencies. Usually a microwave power meter will consist of a measuring head which contains the actual power sensing element, connected via a cable to the… …
59Test light — Neon test lamp for line voltages A test light, test lamp, voltage tester, or mains tester is a very simple piece of electronic test equipment used to determine the presence or absence of an electric voltage in a piece of equipment under test.… …
60BMW R 90 S — The BMW R 90 S is a sport motorcycle that was produced by BMW between 1973 and 1976. The R 90 S is considered by many to be one of the first superbikes, and the first such motorcycle from BMW. The first United States AMA Superbike Championship… …
