to the cold junctions. There are also the so-called thermopile sensors, which are power meters based on the principle that the optical or laser power is converted to heat and the resulting increase in temperature is measured by a thermopile. See also 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 References External links TPA81 Thermopile detector Array Technical Specification Electrical components