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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.
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17 news items

 
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 ...
 
MarketWatch
Thu, 16 Oct 2014 15:30:00 -0700

... POWER Meter II-99Newport Launches 919P Series Thermopile Sensors and 843-RHandheld Optical Power Meter II-99TrendPoint Systems Launches EnerSure Integrated Branch CircuitPower Meter II-99Agilent Technologies Launches 4-Channel N7748A ...
 
Optics.org
Tue, 14 Oct 2014 08:45:00 -0700

The gSKIN® Laser Power Sensors are a combination of the field-tested and widely used thermopile technology and an innovative new structure. With this combination you are able resolve µW of IR power and measure with a constant sensitivity across a ...
 
NewsMaker (press release)
Wed, 10 Sep 2014 04:15:00 -0700

... altitude measurement for car navigation, pressure measurements inside hard disks and weather forecasting equipment. The device can also adopt thermopile sensors to enable contactless temperature measurements of objects or human body temperature.
 
Photonics.com
Mon, 06 Oct 2014 07:30:52 -0700

Passive infrared detectors are nothing new, but they typically use small thermopile arrays that only measure temperature differences within a scene. The new MTC, on the other hand, has enough resolution to actually distinguish between the shapes of ...
 
Universe Today
Mon, 22 Sep 2014 13:14:04 -0700

TM consists of four thermopile sensors with optical filters to cover a wavelength range from 6-25 µm. SD2 Sample Drill and Distribution device will penetrate the surface and subsurface to a depth of 20 cm. Each retrieved sample will be a few cubic ...
 
Phys.Org
Tue, 23 Sep 2014 06:50:02 -0700

TM consists of four thermopile sensors with optical filters to cover a wavelength range from 6-25 µm. SD2 Sample Drill and Distribution device will penetrate the surface and subsurface to a depth of 20 cm. Each retrieved sample will be a few cubic ...

ThomasNet News (press release) (blog)

ThomasNet News (press release) (blog)
Thu, 18 Sep 2014 05:36:18 -0700

The 1000-BB-120 is a water-cooled thermopile detector that features a very large 120mm aperture for handling large beams and laser diode bars. It features a wide dynamic range, measuring powers from 1W to 1000W and energy from 2J to 600J.
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