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Not to be confused with Thermopylae.
Thermopile, composed of multiple thermocouples in series. If both the right and left junctions are the same temperature, voltages cancel out to zero. However if one side is heated and other side cooled, resulting total output voltage is equal to the sum of junction voltage differentials.

A thermopile is an electronic device that converts thermal energy into electrical energy. It is composed of several thermocouples connected usually in series or, less commonly, in parallel.

Thermopiles do not respond to absolute temperature, but generate an output voltage proportional to a local temperature difference or temperature gradient.

Thermopiles are used to provide an output in response to temperature as part of a temperature measuring device, such as the infrared thermometers widely used by medical professionals to measure body temperature. They are also used widely in heat flux sensors (such as the Moll thermopile and Eppley pyrheliometer)[1][2][3] and gas burner safety controls. The output of a thermopile is usually in the range of tens or hundreds of millivolts.[4] As well as increasing the signal level, the device may be used to provide spatial temperature averaging.[5]

Thermopiles are also used to generate electrical energy from, for instance, heat from electrical components, solar wind, radioactive materials, or combustion. The process is also an example of the Peltier Effect (electric current transferring heat energy) as the process transfers heat from the hot to the cold junctions.

See also[edit]

  • Seebeck effect—the physical effect responsible for the generation of voltage in a thermopile.
  • Thermoelectric materials—high-performance materials that can be used to construct a compact thermopile that delivers high power.

External links[edit]

References[edit]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Thermopile — Please support Wikipedia.
This page uses Creative Commons Licensed content from Wikipedia. A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
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296 news items

 
Electropages (blog)
Wed, 29 Oct 2014 07:19:14 -0700

Texas Instruments' TMP007 is an infrared (IR) thermopile sensor that measures the temperature of an object without contacting the object. Available now from Digi-Key, the integrated device absorbs the infrared energy emitted from the object in the ...
 
Laser Focus world
Thu, 02 Oct 2014 07:44:49 -0700

Because conventional laser-measurement methods cannot show how a laser performs over time (lasers fluctuate rapidly from turn-on to several seconds after), real-time thermopile power measurement and beam-profiling techniques can improve laser ...

SourceSecurity.com

SourceSecurity.com
Wed, 19 Nov 2014 02:07:30 -0800

The recently introduced FireVu Multi Detector also adds thermopile (temperature sensing) technology, an industry first in early fire detection. Pauline Norstrom chief operating officer at AD Group comments: “Antony joins us with a wealth of experience ...
 
PR Newswire India (press release)
Fri, 14 Nov 2014 08:30:00 -0800

... namely: Integrated Circuits (ICs), Thermistors, Resistance Temperature Detectors (RTDs) and Thermocouples whereas, Non-contact Sensors are classified into two types, namely: Infrared Temperature Detector and Thermopile. A recent report published by ...
 
Business Wire (press release)
Thu, 13 Nov 2014 02:07:30 -0800

Based on micro system technology, Panasonic's high-precision Grid Eye is perfect for home or automotive security applications as the infra-red sensor arrays use a 64 pixel thermopile to detect not only motionless objects and movement direction, but ...
 
Design News
Fri, 18 Apr 2014 03:02:13 -0700

Peltier, or Thermoelectric, coolers are a fairly modern device, but the concept of generating electricity with dissimilar metals goes back to Seebeck and Peltier's work in the 1800s. Modern devices use alternating P and N semiconductor junctions to ...
 
AZoSensors
Mon, 17 Nov 2014 01:33:45 -0800

... namely: Integrated Circuits (ICs), Thermistors, Resistance Temperature Detectors (RTDs) and Thermocouples whereas, Non-contact Sensors are classified into two types, namely: Infrared Temperature Detector and Thermopile. A recent report published by ...

Photonics.com

Photonics.com
Wed, 29 Oct 2014 13:48:45 -0700

The MD-X Series hybrid laser marker has three axes of control, and a built in 2-D code reader and verifier to accurately mark and check 2-D codes without using a separate device. The device has a thermopile laser power monitor and an IP64 enclosure ...
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