Currently the most widely used thermal resistance material is platinum and copper: high precision platinum resistance, suitable for neutral and oxidizing medium, good stability, with a certain nonlinear intelligent thermal resistance, the smaller the higher the temperature, the resistivity change; copper resistance in the temperature range of the resistance value and temperature linear relationship between the number of line temperature, suitable for non-corrosive media, more than 150 susceptible to oxidation. China's most commonly used are R0 = 10Ω, R0 = 100Ω and R0 = 1000Ω and other types of smart quotes thermal resistance, their indexing numbers are Pt10, Pt100, Pt1000; copper resistance have R0 = 50Ω and R0 = 100Ω two kinds, Their number is Cu50 indexing and Cu100. Pt100 and Cu50 which is most widely used. 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 RTD lead resistance intelligent supply itself, can by c wire to compensate, the lead resistance errors do not affect the lead resistance with temperature changes and the introduction of reduced a lot. Three-wire platinum RTD, in the second instrument manufacturers intelligent thermal resistance, the resistance of the bridge are variable, depending on the thermal resistance of platinum with different ranges, secondary instrument can bridge the platinum RTD fine-tuning can be performed more accurate measurements. Main intelligent thermal resistance, the force measured since the instrument intelligent thermal resistance, heat resistance, Guangxi intelligence provided by the Shanghai Automation Instrumentation Co. measured. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) is the Shanghai Zhabei District, flow meters leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Since the force measuring device leadership with the staff warmly welcome all inquiries negotiations to create the force measuring instrument since a better future.