Currently, the main material for the thermal resistance of the platinum, copper, nickel and the like, using these materials is that they are mainly in the temperature and the resistance ratio of conventional temperature ranges is a linear relationship, we here introduces the platinum resistance thermometer. Platinum is a precious metal image intelligent thermal resistance, it is very stable physical and chemical properties, especially the ability to strong resistance to oxidation, it is easy to purify, have a good process, can be made very fine platinum wire, with copper intelligent thermal resistance supply, nickel and other metals intelligent thermal resistance compared to quote a higher resistivity, high reproducibility, is an ideal material for thermal resistance, temperature coefficient of resistance is small drawback is that, in the medium to work easily restore brittle the price is more expensive. Platinum RTD has two-wire, three-wire, four-wire several, two-wire in the measurement error is large, has not used now for industrial use are generally three-wire system, the laboratory is generally four-wire system. This introduces the wiring 3-wire platinum RTD. Three-wire platinum RTD is in a terminal resistor in parallel with a c-side in order to achieve resistance leads to a, b, c are three terminals, so that by the introduction of the measure b wire resistance wire itself, can be compensated by the c wire intelligent thermal resistance, impact resistance of the lead wire resistance error does not change with temperature decreases introduced a lot. Three-wire platinum RTD, in the second instrument, the bridge has a variable resistance, depending on the fit of platinum RTD range, secondary instrument can bridge the platinum RTD fine-tuning, can a more accurate measurement. Intelligent thermal resistance price | intelligent thermal resistance | Intelligent power measurement instrument since thermal resistance measured by the Shanghai Automation Instrumentation Co., Ltd .. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) strong, credible, in Shanghai Zhabei District, flow meters and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the force measured since the instrument into the brilliant and you work for a better future!