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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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1438 news items


Fri, 24 Apr 2015 07:37:30 -0700

Kipp & Zonen had been involved in the manufacture of a fast and sensitive thermopile used for the measurement of light and thermal radiation since 1913. The design, which was made up of several thermocouples, was by Dr. Moll of Utrecht University.


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 ...
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 ...
PR Newswire (press release)
Thu, 30 Apr 2015 13:14:56 -0700

In this report, the Middle East & Africa IR detector market has been broadly classified into five main technologies, namely MCT, InGaAs, pyroelectric, thermopile, and microbolometer. MCT or mercury cadmium telluride is majorly manufactured by cooled ...
Thu, 21 May 2015 05:45:00 -0700

The types comprise Mercury Cadmium Telluride (MCT) IR detector, microbolometer IR detector, thermopile IR detector, pyroelectric IR detector, and Indium Gallium Arsenide (InGaAs) IR detector. The market is further segmented and forecast based on ...


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, 24 Apr 2015 04:37:30 -0700

Research and Markets has announced the addition of the "Middle East and Africa Image Sensor Market by Technology and by Application - Forecasts to 2019" report to their offering. The image sensor market includes the implementation of image sensors in ...
Design News
Fri, 18 Apr 2014 03:02:13 -0700

Gadget Freak Case #253: Peltier Thermopile Cloud Sensor. Eric Chesak created a sensor that can detect clouds, and it can also measure different sources of radiation. Click here for build instructions, BOMs, and more. NO RATINGS. Login to Rate. 4/18 ...

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