1, the error introduced by improper installation such as the location and depth of insertion of thermocouples installed does not reflect the true temperature of the furnace and other armored thermocouple offer, in other words, should the thermocouple mounted too close to the door and place the heating sheathed thermocouple manufacturers, insertion depth should be at least the diameter of the protective tube 8 to 10 times; protective casing and the wall of the thermocouple unfilled intervals resulted in the furnace heat insulation material spill or cold air invasion, so thermocouple protection tubes and furnace wall hole 1.2 compensation wire (extension or compensating cables) with a pair of wire thermocouples used; voids application fireclay or asbestos insulation materials such as rope between the hot and cold air convection to avoid clogging affect the accuracy of temperature measurement. When equipped with the proper connection with the thermocouple, put the thermocouple reference junction to move it to the output end of the wire. 1.3 Test temperature point (temperature points for verification) test temperature in order to verify compliance with the tolerance requirements of thermocouple selected. 1.4 limit temperature (limiting temperature) thermocouple temperature and the highest applicable minimum application temperature. The highest maximum temperature is suitable temperature is called the minimum application temperature is called the lower temperature. Sheathed thermocouple pictures of measurement, since the instrument quality assurance (certified), sheathed thermocouple measuring the force provided by the Shanghai Automation Instrumentation Co., Ltd. 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.