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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]


Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Thermopile — Please support Wikipedia.
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277 news items


Tue, 16 Dec 2014 07:13:47 -0800

This technology was used by St-Antoine et al.2 to determine the spectral response of the photovoltage of a single-walled carbon nanotubes thermopile. The TLS was also utilized to acquire basic absorption spectra, and made it possible to analyze 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 ...

Energy Global

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Mon, 15 Dec 2014 06:03:45 -0800

Thermopile calorimeters mix and burn sample gas and air. Air flow is then regulated to maintain a constant exhaust temperature. Airflow variations provide an output signal that is proportional to the Wobbe Index. The Wobbe Index is the heating value ...
Tue, 09 Dec 2014 02:52:30 -0800

greenTEG's laser power sensors are based on the thermopile technology. A novel production process allows greenTEG to produce sensor modules of a thickness of only 0.6mm. They measure laser power from deep-ultraviolet to the mid-infrared range with a ...
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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 ...
Design News
Fri, 18 Apr 2014 03:02:13 -0700

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Wed, 19 Nov 2014 02:07:30 -0800

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greenTEG, a company that develops, manufactures and markets a new generation of heat flux and radiation sensors and thermoelectric generators, has developed a new, advanced thermopile sensor that helps in characterizing laser power parameters ...

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