An infrareddetector is a detector that reacts to infrared IR radiation . The two main types of detectors are thermal and photonic photodetector s . The thermal effects of the incident IR radiation can be followed through many temperature dependent phenomena. Bolometer s and microbolometer s are based on changes in resistance. Thermocouple s and thermopile s use the thermoelectric effect . Golay cells follow thermal expansion. In IR spectrometer s the pyroelectric detector s are the most widespread. The response time and sensitivity of photonic detectors can be much higher, but usually these have to be cooled to cut thermal noise . The materials in these are semiconductors with narrow band gaps. Incident IR photons can cause electronic excitations. In photoconductive detectors, the resistivity of the detector element is monitored. Photovoltaic detectors contain a p n junction on which photoelectric current appears upon illumination. A few detector materials Types type Spectral range m Wavenumber cm 1 Indium gallium arsenide InGaAs photodiode 0.7 2.6 14300 3800 Germanium photodiode 0.8 1.7 12500 5900 Lead sulfide PbS photoconductive 1 3.2 10000 3100 Lead selenide PbSe photoconductive 1.5 5.2 6700 1900 Indium antimonide InSb photoconductive 1 6.7 10000 1500 Indium arsenide InAs photovoltaic 1 3.8 10000 2600 Platinum silicide PtSi photovoltaic 1 5 10000 2000 Indium antimonide InSb photodiode 1 5.5 10000 1800 Mercury cadmium telluride MCT, HgCdTe photoconductive 0.8 25 12500 400 ... sulfate TGS and DTGS pyroelectric The range of pyroelectric detector is determined by the window materials used in their construction. Vanadium pentoxide is frequently used as a detector material ... SSD Characteristics and use of infrared detectors.pdf Characteristics and Use of Infrared Detectors ... Advances Lead to Greater Variety of Infrared Detectors Hamamatsu Photonics Category Detectors Category Image sensors Category Infrared imaging fr D tecteur infrarouge ko it Rivelatore ad ... more details
Unreferenced date December 2009 The SPRITE infrareddetector is named after the process of signal integration carried out by Signal Processing In The Element . The technique was invented at the Royal Signals and Radar Establishment at Malvern, Worcestershire Malvern by a team of scientists including C. Thomas Elliott Tom Elliott . The detector allows the build up of detected infrared signal in a Cadmium Mercury Telluride photoconductor strip CMT by applying a bias current through the strip. The detector is used in a scanned thermal imager and the bias voltage is adjusted to force electron s produced by the detected energy at one end of the strip to drift to the far end of the strip in time with the rate of the scanning such that energy from the same response is built up along the full length of the strip. This allows a much simpler way of integrating responses than linking separate detector cells. This type of detector was used in a series of thermal imaging thermal imagers known as TICM thermal imaging common modules . These modules were the mainstay of UK forces thermal imagers from the 1980s until their replacement by fully staring, two dimensional arrays detectors. DEFAULTSORT Sprite InfraredDetector Category Infrared imaging ... more details
versus fixed point detectors An open path detector usually costs more than a Infrared point sensor single point detector , so there is little incentive for applications that play to a point detector s strengths where the point detector can be placed at the known location of the highest gas concentration, and a relatively slow response is acceptable. The open path detector excels in outdoor situations ..., the infrared signal strengths are measured by some form of infrareddetector . Generally photodiode ...Infrared open path gas detectors send out a beam of infrared light, detecting gas anywhere along the path .... Open path detectors can be contrasted with Infrared point sensor s. They are widely used in the petroleum ... absorption of a suitable infrared wavelength in the beam. Rain, fog etc. in the measurement path ... units of measurement for a Infrared point sensor are parts per million ppm or the percentage of the lower flammable limit LFL , the natural units of measurement for an open path detector are ppm.metres ... will one detector replace several, but the costs of installation, maintenance, cabling etc. are likely ..., where a detector appears to be working but is insensitive to gas, is especially serious. For instance ... of the infrared type are immune from the former but not the latter mechanism. Open path detectors ... is easily made to generate a beam block signal, distinct from zero gas or a hardware fault. Infrared .... The possibility of revealed downtime of an open path detector due to fog can be minimised by limiting ... of much greater distances in clear air. Component parts In principle any source of infrared radiation ... spectral power of direct sunlight in the infrared, especially when pulsed. Modern open path ... from the broad infrared spectrum. In principle any conventional spectrometer technique is possible, but the Nondispersive infrared sensor NDIR technique with Optical coating multilayer dielectric ..., and sometimes configurable by the user. Operating wavelengths The choice of infrared wavelengths ... more details
Other uses pp move vandalism small yes File Ir girl.png thumb right An image of two people in mid infrared thermal light false color File Wide field Infrared Survey Explorer first light image.jpg thumb right This infrared space telescope image has blue, green and red corresponding to 3.4, 4.6, and 12 micron wavelengths respectively. Infrared IR light is electromagnetic radiation with longer wavelength ... near room temperature. Infrared light is emitted or absorbed by molecules when they change their Infrared ... in the form of infrared radiation. Sunlight at zenith provides an irradiance of just over 1 kilo kilo watt per square meter at sea level. Of this energy, 527 watts is infrared radiation, 445 ... ref The balance between absorbed and emitted infrared radiation has a critical effect on the Earth s climate. Infrared light is used in industrial, scientific, and medical applications. Night vision devices using infrared illumination allow people or animals to be observed without the observer being detected. In astronomy, imaging at infrared wavelengths allows observation of objects obscured by interstellar dust. Infrared imaging cameras are used to detect heat loss in insulated systems, observe ... 405 THz 1.7 eV 3.3 eV style background FFE8E8 Infrared 750 nm 1 mm 405 THz 300 GHz 1.24 ... 3 Hz 1.24 meV 12.4 Femto f eV Infrared imaging is used extensively for military and civilian purposes ... forecasting . Infrared astronomy uses sensor equipped telescopes to penetrate dusty regions ... www.ipac.caltech.edu Outreach Edu importance.html title IR Astronomy Overview publisher NASA Infrared ... ic level, infrared energy elicits vibration al modes in a molecule through a change in the Molecular ... for molecules of the proper symmetry. Infrared spectroscopy examines absorption and transmission of photon s in the infrared energy range, based on their frequency and intensity. ref cite web last Reusch first William year 1999 url http www.cem.msu.edu reusch VirtualText Spectrpy InfraRed infrared.htm ... more details
cross section InfrareddetectorInfrared countermeasures Survivability DEFAULTSORT Infrared Signature ...The term infrared signature is used by Military science defense scientists and the military to describe the appearance of objects to infrared sensors . An infrared signature depends on many factors, including ... estimation of solid angle subtended by complex well resolved surfaces for infrared detection ..., Gaitonde, U.N., & Marathe A.G. 2001 Numerical studies of infrared signature levels of complete aircraft ..., & Rao, G.A. 2009 Study of sunshine, skyshine, and earthshine for aircraft infrared detection, Journal ... infrared signatures , AIAA Journal of Aircraft , v. 42 4 , pp. 1046 1054. ref and the waveband of the detecting sensor. As such there is no all encompassing definition of infrared signature nor any trivial means of measuring it. For example the infrared signature of a truck viewed against a field will vary significantly with changing weather, time of day and engine loading. Infrared stealth is an area of stealth technology aimed at reducing infrared signatures. ref Mahulikar, S.P., Sonawane, H.R., & Rao, G.A. 2007 Infrared signature studies of aerospace vehicles , Progress in Aerospace Sciences , v. 43 7 8 , pp. 218 245. ref This reduces a platform s susceptibility to infrared guided weapons and infrared surveillance sensors, ref Rao, G.A., & Mahulikar, S.P. 2005 New criterion for aircraft susceptibility to infrared homing missiles , Aerospace Science & Technology , v. 9 8 , pp. 701 712. ref and thus increases the platform s overall survivability. Infrared stealth is particularly ..., S.P., Rao, G.A., Sane, S.K., & Marathe, A.G. 2005 Aircraft plume infrared signature in nonafterburning ..., S.K. 2008 Infrared signature suppression of helicopter engine duct based on conceal and camouflage ... soldiers. A military aim in studying infrared signatures is to understand the likely infrared signature of threats and develop the equipment required to detect them and to reduce the infrared ... more details
File WyomingInfraRedObservatory.jpg thumb right 200px Wyoming Infrared Observatory File SOFIA with open telescope doors.jpg thumb right 200px SOFIA is an infrared telescope in an aircraft, allowing high altitude observations An infrared telescope is a telescope that uses infrared light to detect celestial bodies. Infrared light is one of several types of radiation present in the electromagnetic spectrum ... visible light optical , as well as infrared telescopes. Discoveries Leading to the Invention of the Infrared Telescope In 1800, William Herschel discovered infrared radiation. In 1878, Samuel Pierpoint ... detect incredibly small changes in temperature in the infrared spectrum. In the 1950s, scientists used lead sulfide detectors to detect the infrared radiation from space. These detectors were cooled with liquid nitrogen . Between 1959 and 1961, Harold Johnson created near infrared photometer s which ... bolometer. This invention, cooled by liquid helium , led the way for current infrared telescope development. http www.ipac.caltech.edu Outreach Edu Timeline timeline2.html The three different types of infrared ... types of telescopes contain an infrared camera that must be cooled to hundreds of degrees below zero as well as a special solid state infrareddetector. http coolcosmos.ipac.caltech.edu cosmic classroom ask astronomer faq obs.shtml Ground based telescopes were the first type of infrared telescopes ... have limitations because water vapor in the Earth s atmosphere absorbs infrared radiation. Ground based infrared telescopes tend to be placed on high mountains and in very dry climates to improve visibility. In the 1960s, scientists used balloons to lift infrared telescopes to higher altitudes. With balloons, they were able to reach about 25 miles up. In 1967, infrared telescopes were placed ... borne infrared telescopes. A more recent air borne infrared telescope to reach the stratosphere was NASA s Stratospheric Observatory for Infrared Astronomy SOFIA in May 2010. Together, United States ... more details
of the atmospheric transmittance windows, i.e. the wavelengths regions in which infrared radiation is better transmitted through the atmosphere, the detector materials used to build the infrared ... remote sensing using a combinations of detector materials. The Medium Wavelength Infrared MWIR and the Long ...Infrared vision can be defined as the capability of biological or artificial systems to detect infrared ... in this context since infrared emissions from a body are directly related to their temperature hotter objects emit more energy in the infrared spectrum than colder ones. The human body, as well as many ... environment. Since hotter objects emit more infrared energy than colder ones, it is relatively easy to identify them with an infrareddetector , day or night. Hence, the term night vision is also used sometimes misused in the place of infrared vision , since one of the original purposes in developing ... . ref However, night vision concerns the ability to see in the dark although not necessarily in the infrared ... HowStuffWorks . ref light intensifiers or infrared vision. The former technology uses a photocathode to convert light in the visible or near infrared portions of the electromagnetic spectrum to electrons, amplify the signal and transform it back to photons. Infrared vision on the other hand, uses an infrareddetector working at mid or long wavelengths invisible to the human eye to capture the heat emitted by an object. The infrared spectrum Image Infrared spectrum.gif thumb right 400px The infrared bands in the electromagnetic spectrum. The entire electromagnetic spectrum highlighting the infrared ... from one author to another, ref Hudson R. D. 1969, Infrared System Engineering , John Wiley & Sons Inc., USA. ref ref Piotrowski J. and Rogalski A. 2004, Uncooled Long Wavelength Infrared Photon Detectors , Infrared Phys. Technol., 46 115 131. ref ,. ref Rogalski A. and Chrzanowski K. 2002, Infrared .... 2004, Infrared Imaging and Open Heart Surgery, from InfraredThermography.com by Advanced Infrared ... more details
and 1960s, combined with the improvement of infrareddetector technology, prompted more astronomers ... wavelengths. If infrared detectors were not kept cooled, the radiation from the detector itself would ... common infrareddetector arrays used at research telescopes is HgCdTe arrays. These operate well ...File Carina Nebula in infrared light captured by the Hubble Space Telescope .jpg thumb 300px Carina Nebula in infrared light captured by the Hubble Space Telescope Hubble s Wide Field Camera 3. Infrared astronomy is the branch of astronomy and astrophysics that studies astronomical object s visible in infrared IR radiation. The wavelength of infrared light ranges from 0.75 to 300 micrometers. Infrared ... radiation submillimeter waves. Infrared astronomy began in the 1830s, a few decades after the discovery of infrared light by William Herschel in 1800. Early progress was limited, and it was not until ... and Moon were detected in infrared light. After a number of discoveries were made in the 1950s and 1960s ... wavelength range, and modern infrared astronomy was established. Infrared and optical astronomy are often ... effective over a wavelength range that includes both visible and infrared light. Both fields also use ... are different. Infrared light is absorption electromagnetic radiation absorb ed at many wavelengths by water vapor in the Earth s atmosphere , so most infrared telescopes are at high elevations in dry places, above as much of the atmosphere as possible. There are also infrared observatories in space ... with open telescope doors.jpg thumb right 200px SOFIA is an infrared telescope in an aircraft, shown here in a 2009 test The discovery of infrared radiation is attributed to William Herschel, who performed ... at infrared wavelengths was due to the spectral index of the prism rather than properties of the Sun ... bio.html title Herschel Discovers Infrared Light accessdate 2010 04 09 ref Efforts were made starting in the 1830s and continuing through the 19th century to detect infrared radiation from other astronomical ... more details
Top tree photographed in the near infrared range. Bottom same tree in the Visible spectrum ... Infrared image of the Mississippi River crossed by a bridge and a dam, between red foliage on left ... vs. Infrared 900nm LP Aerial Photography of Old Hickory Lake , Tennessee . Taken from a passenger airplane within seconds apart using SONY H 9 Digital camera. In infrared photography , the film or image sensor used is sensitive to infrared light. The part of the visible spectrum spectrum used is referred to as near infrared to distinguish it from far infrared, which is the domain of thermal .... Film is usually sensitive to visible light too, so an infrared passing filter is used this lets infrared ... thus looks black or deep red . Infrared filter may refer either to such a filter or to one that blocks infrared but passes other wavelengths. When these band pass filter filters are used together with infrared sensitive film or sensors, very interesting in camera effect s can be obtained false ... in infrared photographs. The effect is named after the infrared photography pioneer Robert W. Wood , and not after the material wood, which does not strongly reflect infrared. The other attributes of infrared ..., result in less infrared light in shadows and dark reflections of those skies from water, and clouds ... a milky look to portraits, although eyes often look black. History Until the early 20th century, infrared ... of Photography accessdate 2006 11 28 ref The first infrared photographs as distinct from spectrographs ... of this event in 2010. ref cite journal journal The RPS Journal title 100 Years of Infrared author ... work focused on landscapes. A further set of infrared landscapes taken by Wood in Italy in 1911 used plates provided for him by CEK Mees at Wratten & Wainwright. Mees also took a few infrared photographs in Portugal in 1910, which are now in the Kodak archives. Infrared sensitive photographic plates were developed in the United States during World War I for spectroscopic analysis, and infrared ... more details
Cleanup date June 2011 unreferenced date December 2008 Infrared thermometers infer temperature using a portion of the thermal radiation sometimes called blackbody radiation emitted by the object of measurement .... By knowing the amount of infrared energy emitted by the object and its emissivity , the object s temperature ... of the two possibilities. The most basic design consists of a lens to focus the infrared thermal radiation on to a detector , which converts the radiant power to an electrical signal that can .... As such, the infrared thermometer is useful for measuring temperature under circumstances ... a significant temperature gradient on the object s surface. Infrared thermometers can be used ... varieties of infrared temperature sensing devices available today, including configurations designed ... to the surface, if the allowed measurement error is acceptable. The most common infrared thermometers are the Spot Infrared Thermometer or Infrared Pyrometer , which measures the temperature at a spot ..., although not strictly thermometers, includes Infrared Scanning Systems scan a larger area, typically ... exiting an oven, fabric and paper, or continuous piles of material along a conveyor belt. Infrared Thermal Imaging Cameras or Thermographic camera Infrared Cameras are essentially infrared radiation .... A photographic camera using infrared film and suitable lens, etc., is also called an infrared camera .... Image Infrared thermometer.JPG An IR thermometer in use in industry gallery External links Commons category Thermography http www.irinfo.org IRINFO.ORG The Definitive Online Resource for Infrared Thermography ... Introduction to Infrared Thermometers Omega http www.irapps.com Applications of Infrared Thermometers ... 1990s http www.tempsensornews.com News of infrared and thermal imaging products & services with dedicated RSS newsfeeds See also Infrared camera Thermography ASTM Subcommittee E20.02 on Radiation Thermometry Sakuma Hattori equation List of laser articles DEFAULTSORT Infrared Thermometer Category Thermometers ... more details
, more portable, and more reliable, but the basic principle is the same. Infrared missile seeker technology see also Infrared homing Infrared missile seekers of the first generation typically used a spinning reticle with a pattern on it that modulates infrared energy before it falls on a detector ... An infrared countermeasure IRCM is a device designed to protect aircraft from infrared homing heat seeking missiles by confusing the missiles infrared guidance system so that they will miss their target ... is the same. By modulating the signal, the steering logic can tell where the infrared source ... 144 modulated IRCM jammer. Infrared seekers are designed to track a strong source of infrared radiation ... of infrared radiation with a higher intensity than the target. When this modulated radiation is seen ... lock. Once an infrared seeker breaks lock they typically have a field of view of 1 2 degrees , they rarely ... seeker to lock onto a new infrared source that is rapidly moving away from the true target. The modulated ... source of radiation DIRCM . ref http www.dtic.mil srch doc?collection t3&id ADA364021 The Infrared ... of standard IRCM systems is that they broadcast a bright source of infrared. If the modulation ... , or Directional Infrared Countermeasures, avoid this potential drawback by mounting the energy source ... Infrared Countermeasure MUSIC that will similarly use active laser s instead of flare countermeasure ... DoN LAIRCM by Northrop Grumman provides infrared threat protection for U.S. Marine Corps ... 196013 Northrop Grumman to Provide Infrared Missile Warning Systems and Processors to the U.S. Navy for Heavy Lift Helicopter Fleets ref BAE Systems AN ALQ 212 advanced threat infrared countermeasures ATIRCM part of a directable infrared countermeasures suite is fielded on U.S. Army CH 47 Chinook helicopters. The suite provides protection against an array of threats, including all infrared threat bands. The AN ALQ 212 incorporates one or more infrared jam heads to counter multiple missile attacks ... more details
for example, what light source is used, what infrareddetector is used, etc. . The reference measurement ...For a table of IR spectroscopy data infrared spectroscopy correlation table Infrared spectroscopy IR spectroscopy is the spectroscopy that deals with the infrared region of the electromagnetic spectrum ... is a Fourier transform infrared spectroscopy Fourier transform infrared FTIR spectrometer . The infrared ... infrared, named for their relation to the visible spectrum. The higher energy near IR, approximately ... mathematics harmonic vibrations. The mid infrared, approximately 4000 400 cm sup 1 sup 2.5 ... vibrational structure. The far infrared, approximately 400 10 wavenumber cm sup 1 sup ... based on the relative molecular or electromagnetic properties. Theory Infrared spectroscopy exploits ... results in an unexpected shift in energy and intensity of the bands. Practical IR spectroscopy The infrared spectrum of a sample is recorded by passing a beam of infrared light through the sample. When ... of very complex mixtures. Spectra issues with infrared fluorescence are rare. Sample ... of the interest. A simple glass tube with length of 5 to 10 cm equipped with infrared windows ... the infrared light is guided with mirrors to travel through the gas. White s cells are available ... to the infrared light and do not introduce any lines onto the spectra. Solid samples can ... spectrometer. A beam of infrared light is produced, passed through an interferometer not shown , and then split .... The beams are both reflected back towards a detector, however first they pass through a splitter, which quickly alternates which of the two beams enters the detector. The two signals are then compared ... of the light source drifts over time. To take the infrared spectrum of a sample, it is necessary ... is not perfectly reliable if the infrared lamp is a bit brighter during the reference measurement ... Main Fourier transform infrared spectroscopy File FTIR interferogram.svg thumb An interferogram from ... more details
Infrared may mean The infrared range of light. Infrared spectroscopy subset of spectroscopy Infrared record label , a UK based record label. Infra Red song , a song by the band Placebo band Placebo . Disambig ... more details
Refimprove date March 2009 merge Proximity sensor date October 2010 Proximity detectors are devices that use mutual capacitance between itself and object in order to detect its presence. ref Cite book title The Alarm, Sensor & Security Circuit Cookbook first Thomas last Petruzzellis publisher McGraw Hill Professional year 1993 ISBN 0830643141 ref There are many types of proximity detector. Common types include magnetic proximity switch see reed switch infrared proximity switch See also Magnetic proximity fuse Proximity sensor Touch switch , another device made possible by body capacitance References Reflist DEFAULTSORT Proximity Detector Category Switches Category Detectors science stub ... more details
Infrared Mammography is a specific form of breast thermography. The term was trademarked in 2011 by Infrared Medical Solutions and refers to the methods and standards used by Dr. Philip Hoekstra to perform breast thermography. Category Infrared imaging ... more details
detector may be preferred. See also Fire alarm Flame detector Aspirated smoke detector Smoke detector Carbon monoxide detector Passive infrared sensor Manual call point or Break glass alarm Fire sprinkler .... This type of heat detector can operate at a lower temperature fire condition than would be possible .... Detector responds when first s temperature increases relative to the other. Rate of rise detectors ... temperature element reaches the design threshold. Heat detector selection Heat detectors commonly ... to replace smoke detectors in the bedrooms or in the hallway outside of the bedrooms. A heat detector ... type of heat detector has its advantages, and it cannot be said that one type of heat detector should always be used instead of another. If you were to place a rate of rise heat detector above a large ... heat transient. In this circumstance the fixed threshold detector would probably be best. If a room filled with highly combustible materials is protected with a fixed heat detector then a fast flaming ... Detector Category Active fire protection Category Safety equipment Category Fire detection and alarm ... more details
Infrared lamps are electrical devices which emit infrared radiation. Infrared lamps have many uses, but are most commonly used in communication and heating . Less common uses include illumination for use with night vision device s. Heating main Infrared heater Radiant heating Infrared heating uses infrared lamps, commonly called heat lamps to transmit infrared radiation to the body that is being heated. When large bodies or bodies with a large surface area need to be heated, infrared lamps are often used in banks. Infrared heat lamps are commonly incandescent bulbs which are able to produce infrared radiation. Infrared lamps have many industrial applications including curing coatings and preparing plastic for forming, commercial applications such as cooking and browning food, and personal applications such as providing heat especially in bathrooms and for pets . Communication Image Blue infrared light.jpg thumb 300px right Infrared light from the LED of a remote control as seen by a digital camera. IR data transmission is also employed in short range communication among computer peripherals and personal digital assistant s. These devices usually conform to standards published by Infrared Data Association IrDA , the Infrared Data Association. Remote controls and IrDA devices use infrared light emitting diode s LEDs to emit infrared radiation which is focused by a plastic Lens optics lens into a narrow beam. The beam is modulation modulated , i.e. switched on and off, to encode the data . The receiver uses a silicon photodiode to convert the infrared radiation to an electric Current electricity current . It responds only to the rapidly pulsing signal created by the transmitter, and filters out slowly changing infrared radiation from ambient light. Infrared communications are useful ... not interfere with other devices in adjoining rooms. Infrared is the most common way for remote control s to command appliances. See also Infrared Applications Infrared communications applications Category ... more details
Image Vlamdetectie spectrum.jpg thumb right 350px Flame detector type regions There are several types of flame detector. The optical flame detector is a detector that uses optical sensor s to detect flame s. There are also ionisation flame detectors, which use current flow in the flame to detect flame presence, and thermocouple flame detectors. Optical Types Ultraviolet Ultraviolet UV detectors work with wavelength s shorter than 300 nanometre nm . These detectors detect fires and explosions within 3 4 milliseconds due to the UV radiation emitted at the instant of their ignition. False alarms can be triggered by UV sources such as lightning , arc welding , radiation , and sunlight . In order to reduce false alarm a time delay of 2 3 seconds is often included in the UV Flame detector design. Near IR Array Near Infrared IR array flame detectors, also known as visual flame detectors employ flame recognition technology to confirm fire by analyzing near IR radiation via the pixel array of a charge coupled device CCD . InfraredInfrared IR flame detectors work within the infrared spectral band. Hot gases emit a specific spectral pattern in the infrared region, which can be sensed with a thermal imaging camera TIC a type of thermographic camera . False alarms can be caused by other hot surfaces and background thermal radiation in the area as well as blinding from water and solar energy. A typical frequency where single frequency IR flame detector is sensitive is in the 4.4 micrometre ... signal in two infrared ranges. In this case one sensor looks at the 4.4 micrometre range the other ... the detector to distinguish between non flame IR sources, and flames that emit hot CO sub ... become somewhat less sensitive, and more immune to false alarms. Triple IR, like other IR detector types, is susceptible to blinding by a layer of water on the detector s window. Visible sensors ... systems See also Flame Flame detection Active fire protection Flame ionization detector Gas leak ... more details
wiktionary detector A detector is a device capable of registering a specific substance or physical phenomenon. Detector may also refer to Detector radio , a device that recovers information from a modulated wave Detector film Detector film , a 2000 Norwegian film USS Detector USS Detector , two United States Navy ships USS Detector AMc 75 , was a coastal minesweeper launched 29 May 1941 USS Detector AM 429 , was a minesweeper launched 5 December 1952 disambiguation cs Detektor de Detektor ru uk ... more details
bead sensor Explosimeter Infrared point sensor Infrared open path detector Other Flame ionization detector Nondispersive infrared sensor Photoionization detector Zirconium oxide sensor cell Catalytic sensors Metal oxide semiconductor Gold film Detector tubes Sample collection and chemical analysis Piezoelectric microcantilever Holographic Sensor Thermal Conductivity Detector Manufacturers ...Image Detector for Gas.jpg thumb 250px right Portable gas detector A gas detector is a device which detects the presence of various gas es within an area, usually as part of a safety system. This type of equipment is used to detect a gas leak and interface with a control system so a process can be automatically shut down. A gas detector can also sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave the area. This type of device is important because there are many gases that can be harmful to organic life, such as humans or animals. Gas detectors ... can be classified according to the operation mechanism semiconductors, oxidation, catalytic, infrared ... situation. Gas detector calibration All gas detectors must be calibrated on a schedule. Of the two ... gas detector is a daily bump test accompanied by a monthly calibration. ref cite web last Moore first James url http www.idealcalibrations.com gas detector news 2010 10 14 article calibration ... Health and Safety Magazine ref Almost every portable gas detector out there has a specific calibration ... Appliances http www.det tronics.com Detector Electronics Corp. Det Tronics http www.detcon.com Detcon ... docbyalias equip gas detectors Linde G TECTA respoRAE ref http www.resporaesystems.com Natural Gas Detector, Portable Gas Detector, Multi Gas Detector India ref See also Gas leak Gas leak detection Hydrogen ... Adsistor Tech DEFAULTSORT Gas Detector Category Safety equipment Category Detectors Category Gas sensors de Gassensor es Detector de gas ja ro Detector de gaze ru sl Detektor ... more details
Image Radar Detector. canada. Escort Passport 8500 x50 blue 3635.jpg thumb Passport x50 Radar Laser detector. A LIDAR detector or laser detector is a passive device designed to detect the infrared emissions of law enforcement agencies LIDAR speed detection devices and warn motorists that their speed is being measured. A limitation of LIDAR is that it cannot be used while a police car is in motion, because it requires the operator to actively target each vehicle, whereas traditional radar can be operated while the police officer is driving his car. Other restrictions include a precipitation free environment, as the laser can produce erratic readings from airborne moisture or smoke. ref cite web url http www.escortradar.com 6800manl.htm how laser works title How Laser Works from Escort Passport 6800 owner s manual publisher http escortradar.com Escort Inc. accessdate 2008 08 07 ref Popularity of LIDAR speed detection is on the rise, though, as costs decline, ease of operation approaches radar, and existing radar equipment reaches its end of service life and is rotated out of service. LIDAR detectors are generally less effective than radar detectors as the emissions they monitor are more brief, more concentrated and less easily scattered than radar a motorist may therefore not have sufficient time to respond to the burst transmission of a LIDAR device, or the narrow beam might be focused on a specific part of a vehicle where the sensor cannot see it. See also Radar detector Laser jammer List of laser articles References reflist External links NoMoreLinks DO NOT ADD MORE LINKS TO THIS ARTICLE. WIKIPEDIA IS NOT A COLLECTION OF LINKS. If you think that your link might be useful, do not add it here, but put it on this article s discussion page first or submit your link to the appropriate category at the Open Directory Project www.dmoz.org and link back to that category using the dmoz template. Links that have not been verified WILL BE DELETED. See Wikipedia External links and Wikipedia ... more details
Infrared cirrus are filamentary structures seen in infrared light. The name is given because the structure looks cloud like in appearance. First detected by the IRAS Infrared Astronomy Satellite at wavelengths of 60 and 100 micrometres. See also Cosmic infrared background radiation External links http arxiv.org abs astro ph 0507587 Molecular Hydrogen in Infrared Cirrus , Kristen Gillmon, J. Michael Shull, 2006 Abstract http arxiv.org pdf astro ph 0507587 PDF Paper http www.sofia.usra.edu Science science cases dowell v2.pdf The Physics of Infrared Cirrus , C. Darren Dowell, Roger H. Hildebrand, Alex Lazarian, Michael W. Werner, Ellen Zweibel DEFAULTSORT Infrared Cirrus Category Interstellar media astronomy stub de Infrarot Cirrus fr Cirrus infrarouge zh ... more details
Image Motion detector.jpg thumb 150px A motion detector attached to a garage Unreferenced date March 2007 A motion detector is a device for motion detection . That is, it is a device that contains a physical mechanism or electronic sensor that quantifies motion physics motion that can be either integrated with or connected to other devices that alert the user of the presence of a moving object within the field of view. They form a vital component of comprehensive security systems, for both homes and businesses. Overview An electronic motion detector contains a motion sensor that transforms the detection of motion into an electric signal. This can be achieved by measuring optical changes in the field of view. Most motion detectors can detect up to nowrap 15 25 meters 50 80ft . A motion detector may be connected to a burglar alarm that is used to alert the home owner or security service after it detects motion. Such a detector may also trigger a red light camera . Motion detectors have found great application in domestic and commercial applications. Some of these applications include motion activated outdoor lighting systems, motion sensor street lamps and motion sensor lanterns. ref http www.smart surveillance tips.com motion sensor light.html Motion Sensor Light Three Excellent Applications of Energy Efficient Motion Sensor Lights ref An occupancy sensor is a motion detector that is integrated with a timing device. It senses when motion has stopped for a specified time period ... There are basically four types of sensors used in motion detectors spectrum Passive infrared ... radar gun. Tomographic Detector active Senses disturbances to radio waves as they travel through an area .... See also Smoke detector Heat detector Pickup music technology Motion detection Motion controller for video ... How to build your own motion detector http www.xandem.com motion detection Xandem Tomographic motion detector company DEFAULTSORT Motion Detector Category Security technology fa ... more details
Refimprove date December 2008 Image BatDetector.jpg thumb A Bat detector Image Batbox Griffin Time Expansion Bat Detector.png thumb All Digital Bat detector with Heterodyne, Frequency Division and Time ... bat detector 68kb. This is a typical echolocation call with feeding buzzes when it attempts to capture an insect. format Ogg A bat detector is a device used to detect the presence of bat s by converting ... bat detector types other types of detector which record bat calls so that they can be analysed afterwards ... by a constant frequency call as heard on a heterodyne bat detector 190 Kb format Ogg The FM call ... effect as the bat flies past. A heterodyne bat detector exaggerates the Doppler effect. As the bat making the CF calls flies toward the detector, the pitch falls. Several species of bat use a composite ..., giving a hockey stick shape to the graph. This makes the call sound different on a bat detector Listen ... call recorded on a heterodyne bat detector set to near the end frequency 190 Kb format Ogg This gives ... can vary widely. There are three types of real time audio bat detector in common use the heterodyne ... detector types Heterodyne Heterodyne detectors are the most commonly used, and most self build detectors are of this type. A heterodyne function is often also built into the other types of detector. A heterodyne bat detector simply shifts all the ultrasound frequencies downwards by a fixed amount so ... are sounded together. A heterodyne bat detector combines the bat call with a constant internal frequency ... quality version of a heterodyne, or direct conversion, bat detector is the super heterodyne detector ... entirely digitally. The tuning issue can be addressed by using a scanning circuit to enable the detector to scan the spectrum automatically and stop scanning when a bat call is heard. One example of such a detector is the http home.earthlink.net bat detector Scanner BatScanner.html Bat Scanner . It is also possible to use a comb spectrum generator as the local oscillator so that the detector is effectively ... more details
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