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) and gas burner safety controls. The output of a thermopile is usually in the range of tens or hundreds of millivolts. As well as increasing the signal level, the device may be used to provide spatial temperature averaging.
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.
- 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.
Elko Daily Free Press
Elko Daily Free Press
Thu, 26 Feb 2015 15:01:50 -0800
It took the advent of the semiconductor age to fabricate a sensor that could be adapted into a thermometer that works by observing the wavelength of light. In many IR optical thermometers the incoming light is focused onto a sensor called a thermopile.
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Another effort, called Thermopile, focuses on dealing with human-waste in a way that is carbon-beneficial (and safe). Over the next hour, with an almost religious zeal, he scribbles on the dry-erase board and tells me how the 2008 experiment, known as ...
Fort Mills Times
Tue, 17 Feb 2015 02:07:30 -0800
Most of the IR sensor types like PIRs, receivers, transmitters and photodiodes are cheap (<$1), but the thermopile sensors, pyroelectric arrays and microbolometers cost much higher. Increasing demand for home automation products, growth of process ...
ThomasNet News (press release) (blog)
Sun, 15 Feb 2015 01:56:15 -0800
One of the main reasons for the unique performance of the IR sensor is the custom designed and built thermopile based sensor. The new IRt/c Standard 4 Wire model including an embedded contact thermocouple has been used in the M&R design and both ...
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Panasonic Automotive & Industrial Systems has launched the first-ever surface mount thermopile array sensor. Grid-EYE features 64 thermopile elements in an 8 x 8 grid format that detect absolute temperatures by infrared radiation. The device is able to ...
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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 ...
Mon, 05 Mar 2012 13:56:15 -0800
March 5, 2012 — New micro electro mechanical system (MEMS) thermopile players and applications are boosting market growth for infrared (IR) detectors, finds Yole Développement in its new report "Infrared Detector Market, Applications & Technology ...
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