Selenium meter — A selenium meter is a light measuring instrument based photoelectric properties of selenium. The most common usage of such light meters is measuring the exposure value for photography. The electric parts of such a meter are an electromagnetic… … Wikipedia
VU meter — A VU meter is often included in analog audio equipment to display a signal level in Volume Units.It is intentionally a slow measurement, averaging out peaks and troughs of short duration to reflect the perceived loudness of the material. It was… … Wikipedia
S meter — An S meter (signal strength meter) is an indicator often provided on communications receivers, such as amateur radio receivers or shortwave broadcast receivers. The scale markings are derived from a subjective system of reporting signal strength… … Wikipedia
PH meter — A pH meter is an electronic instrument used to measure the pH (acidity or alkalinity) of a liquid (though special probes are sometimes used to measure the pH of semi solid substances). A typical pH meter consists of a special measuring probe (a… … Wikipedia
Smart meter — [ http://www.elstermetering.com/en/1914.shtml Elster REX] ) with 900MHz [ [http://www.elster eis.com/en/LAN.html EnergyAxis LAN 900MHz Frequency hopping spread spectrum (FHSS) radio] ] mesh network topology for automatic meter reading and… … Wikipedia
Light meter — A light meter is a device used to measure the amount of light. In photography, a light meter is often used to determine the proper exposure for a photograph. Typically a light meter will include a computer, either digital or analogue, which… … Wikipedia
Postage meter — A postage meter is a mechanical device used to create and apply physical evidence of postage (or franking) to mailed matter. Postage meters are regulated by a country s postal authority; for example, in the United States, the United States Postal … Wikipedia
HOm scale — Infobox Model Rail Scale name = HOm image filename = Minho Douro HOm.jpg image caption = A HOm layout set in Portugal widthpx = 300px scale = 3.5 mm to 1 foot ratio = 1:87 gauge = 12 mm prototype gauge = RailGauge|1mHOm scale or HOm gauge is used … Wikipedia
exposure meter — Photog. an instrument for measuring the intensity of light in a certain place or upon a certain object, having an adjustable scale for determining the optimum relations of shutter speeds and stops at each intensity. Also called light meter. [1890 … Universalium
Kodak Retina Reflex — Infobox camera camera name = Kodak Retina Reflex caption = Retina Reflex type III type = 35mm SLR camera lens mount = bayonet focus = manual exposure = manual flash = cold shoe frame rate = dimensions = The Kodak Retina Reflex was a series of… … Wikipedia
Naval Cathedral in Kronstadt — Naval Cathedral of Saint Nicholas in Kronstadt Basic information Geographic coordinates … Wikipedia