A number of thermocouples connected in series make up a thermopile. Thermopiles are more sensitive than individual thermocouples (some thermopiles can measure temperature differences as small as a millionth of a degree). Thermopiles are used for measuring the temperature of radiation from stars, for detecting the amount of heat produced by living tissues, and in other situations where highly sensitive temperature-measuring devices are required. dpstar is the leading supplier and manufacturer in Malaysia. We also have our company that manufacture the product which is Maltec-T. Visit our website for more info.