Further, photodiodes are reverse biased and saturate for optical powers above a certain value ( typically in mW ), making thermopile sensors suitable for high power measurements.
32.
In 1913, he developed thermopile detectors and used them at Lick Observatory to measure IR radiation from 110 stars, and the planets Mars, Venus, and Jupiter.
33.
So-called " millivolt " thermostat systems use thermopiles heated by gas-fired pilot lights to produce the electricity that is then used to control the heating system.
34.
Thermocouples can be connected in series to form a thermopile, where all the hot junctions are exposed to a higher temperature and all the cold junctions to a lower temperature.
35.
Depending on application there are several thermosyphon designs : thermoprobe, thermopile, depth thermosyphon, sloped-thermosyphon foundation, flat loop thermosyphon foundation, hybrid flat loop thermosyphon foundation.
36.
The passive ( cold ) junctions of the thermopile are fully protected from solar radiation and in thermal contact with the pyranometer housing, which serves as a heat-sink.
37.
Tyndall spectrally decomposed the radiation by use of a rock salt prism, which passed heat as well as visible rays, and measured the radiation intensity by means of a thermopile.
38.
In the modern thermopile pyranometers the active ( hot ) junctions of the thermopile are located beneath the black coating surface and are heated by the radiation absorbed from the black coating.
39.
In the modern thermopile pyranometers the active ( hot ) junctions of the thermopile are located beneath the black coating surface and are heated by the radiation absorbed from the black coating.
40.
A large array of SiGe thermocouples / unicouples form a thermopile that was incorporated into the design of radioisotope thermoelectric generators ( RTGs ) used in the missions " natural decay.
