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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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1268 news items


Thu, 12 Mar 2015 07:26:15 -0700

A thermopile detector is a passive radiation sensing voltage-generating device. It does not emit any radiation and require cooling or bias. Dexter Research Center (DRC) provides stable, high output radiation sensing thermopile detectors covering linear ...

Transport Evolved

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Wed, 01 Apr 2015 03:41:51 -0700

But now nanotechnology — in the form of nanostructured superlattice thin films — has made it possible for researchers to build a thermopile unit that can generate up to 20 kilowatts of electrical energy from the heat generated by a decent roaring fire.

Greentech Media

Greentech Media
Thu, 02 Apr 2015 07:03:45 -0700

... for an off-grid system or device in an extremely remote location that can't be regularly serviced, a solution provided today by firms like Global Thermoelectric is to burn propane (in a big tank) and heat a relatively low-efficiency semiconductor ...


Thu, 19 Mar 2015 09:07:30 -0700

The robust package is designed for straightforward system integration. and the detector signal is amplified and normalized to facilitate read-out. The major differentiation to other thermopile detectors is, however, the signal rise time, which is a ...
Fri, 13 Mar 2015 08:45:00 -0700

Time constant, signal-to-noise ratio (SNR), responsivity and output voltage are the four key performance parameters affected based on the selection of an encapsulating gas in a thermopile detector package. The effect of the molecular thermal ...


Mon, 13 Apr 2015 04:03:45 -0700

FireVu offers a video based early detection for flame, smoke and can be combined with a thermopile capability (temperature sensing). AD Network Video provides tailored high-end secure IP video solutions, with consultancy, for clients that demand ...
Virtual-Strategy Magazine (press release)
Wed, 08 Apr 2015 08:33:45 -0700

The different IR detector technologies included in this market report are Mercury Cadmium Telluride (MCT), microbolometer, thermopile, pyroelectric, and Indium Gallium Arsenide (InGaAs). The application segment focuses on people and motion sensing, ...


Tue, 17 Mar 2015 08:22:30 -0700

Dexter's 2M quad thermopile detector is a four-channel thin-film thermopile compactly placed in a TO-8 package. All the active areas measure 2mm x 2mm. The detector provides exceptional four-channel sensitivity with excellent signal- to-noise performance.

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