2.5 insulated temperature sensing element of the ceramic tube should be smooth and complete, hot wires should be no damage, disorder, corrosion and other phenomena. At room temperature 20 ℃, between the sensing element (dual or multi-branch) and components of the insulation resistance between the shell should be more than 20MΩ (with 250V shake table). 2.6 calibration and adjustment: check field thermal resistance is now commonly used in thermal resistance temperature element automatic calibrator. Calibration method is to measure the end standard thermal resistance and heat resistance of the subject inserted into a quartz glass tube, insert them into the same depth within the fuel tank, and adjust the temperature field more uniform wear thermal resistance Main, electric measuring devices were measured the standard thermal resistance and heat resistance of the subject heat resistance ratio of 0 ℃ and 100 ℃ to determine the thermal resistance of the subject error. Commonly used industrial heat resistance Pt100, Pt10, Cu50 wear thermal resistance distribution, Cu100 wear thermal resistance, platinum RTD temperature range is generally minus 200-800 ℃, copper heat resistance is minus 40 到 140 ℃. RTD and thermocouple types as distinction, but he did not need compensation wire, and cheaper than the thermocouple. Many installation in the form of platinum thermal resistance, a fixed screwed, screwed activity, fixed flange mounting, installation flanges, fittings installation activities, installation of straight pipe joints and so on. _ Production of wear-resistant thermal resistance force probe since the instrument (certified) _ Nanjing wear thermal resistance provided by the Shanghai Automation Instrumentation Co., force measurement. 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. In force since the instrument measuring leadership with the staff warmly welcome all inquiries negotiations to create the force measuring instrument from a better future.