spot radiometer
Spanish translation: radiómetro simple
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| 20:31 Apr 23, 2005 |
| English to Spanish translations [PRO] Tech/Engineering - Electronics / Elect Eng | |||||||
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|  Selected response from: Maria Karra United States Local time: 16:32 | ||||||
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| Summary of answers provided | ||||
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| 5 | radiómetro o medidor (o detector) de la radiación electromagnética |
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| 4 | pirómetro |
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Answers
58 mins confidence: 
radiómetro o medidor (o detector) de la radiación electromagnética Explanation: radiometer (rā'dēŏm'ətər) , instrument for detection or measurement of electromagnetic radiation; the term is applied in particular to devices used to measure infrared radiation. One of the earliest experiments in radiometry was performed c.1800 by W. Herschel, who observed the heating of a mercury thermometer by sunlight; he was also able to detect heat radiated from hot but not incandescent bodies. E. Becquerel was able (c.1843) to detect near-infrared radiation by photographic means. Radiometers that function by an increase in the temperature of the device, such as Herschel's thermometer, are called thermal detectors. Commonly used thermal detectors include the thermocouple, which produces a voltage when heated, and the bolometer, which changes in electrical resistance when heated. Devices that can, in principle, detect a single quantum of radiant energy, such as Becquerel's photographic plate, are called quantum detectors. Many current quantum detectors are based on the photoelectric cell. The term radiometer is often used to refer specifically to a type of thermal detector invented by Sir William Crookes (c.1874). Because his device was somewhat insensitive and not readily calibrated, it is rarely used today as a scientific instrument. A Crookes radiometer consists essentially of two parts. The first part is a glass bulb from which most of the air has been removed, creating a partial vacuum. The second part is a rotor that is mounted on a vertical support inside the bulb. The rotor consists of four light, horizontal arms mounted at right angles to one another on a central pivot; the rotor can turn freely in the horizontal plane. At the outer end of each arm is mounted a metal vane, placed vertically. Each vane has one side polished and the other blackened; the vanes are arranged so that the polished side of one faces the blackened side of the next. When radiant energy strikes the polished surfaces, most of it is reflected away, but when it strikes the blackened surfaces, most of it is absorbed, raising the temperature of the surfaces. The air near a blackened surface thus becomes hotter, exerts a greater pressure on the blackened surface, and causes the rotor to turn. The rate of rotation provides an indication of the intensity of the radiation. Reference: http://www.answers.com/radiometer |
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1 hr confidence: 
pirómetro Explanation: pirómetro. I think you can also say "radiómetro simple", where "simple" implies that we're dealing with a spot radiometer. (non-simple would be an imager, radiómetro bidimensional, etc). The energy auditor may use one of several types of infrared sensing devices in an on-site inspection. A spot radiometer (also called a point radiometer) is the simplest. It measures radiation one spot at a time, with a simple meter reading showing the temperature of a given spot. http://www.eere.energy.gov/consumerinfo/factsheets/cb3.html Users have many names for these unique instruments: spot radiometers, heat guns, thermometers, pyrometers, etc. Spot radiometer advocates insist that imagers are overkill for conducting temperature measurements. Thermal imaging advocates argue that spot radiometers don't give you the entire picture - that you can never be sure you have found the hottest spot. both views may be correct, depending on the application. http://www.reliabilitydirect.com/newsletter/vol2issue5.htm |
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