What are common ordinary industrial thermocouple - Shanghai dragon instrument electric appliance co. , LTD

Thermocouple temperature measurement principle is based on the seebeck effect, namely: if two different components of homogeneous conductor closed loop, when when there is a temperature gradient at both ends has a current loop, they exist electromotive force between two ends, also called the seebeck electromotive force. Its value size and properties of the metal material of the thermocouple, only related to the size of the temperature difference on both ends, with two hot thermocouple electrode geometry size ( Length, diameter) And along the length of the electrode direction of temperature distribution. Thermocouple can also be regarded as a form of transducer, it is the thermal energy into electrical energy, through the measurement circuit of electromotive force size, and the application of thermoelectric potential and the function relation between temperature and reach the purpose of temperature measurement. Thermocouple of simple structure, stable performance, wide temperature range, temperature measurement precision, using the bento, widely used in mechanical industry consumption, scientific research in the aspects of heat treatment temperature and the temperature control process. According to the composition of thermocouple data and structure is different, ( Thermocouple can be many varieties of share out bonus) 。 Correctly choose device with thermocouple, is the precondition of reasonable use of thermocouple, not only can accurately get temperature values, ensure the quality of production, but also can build cost of thermocouple data. Thermocouple choice, should first on the basis of the measured temperature limit and the environment to choose the hot electrode and maintenance of the casing thermocouple, secondly on the basis of the structure of the measured object and the device characteristics to choose the specifications of the thermocouple measurements. Thermocouple according to the structure in different ways can be divided into: ordinary addition, kai type, high performance entity type and special type thermocouple. Common ordinary industrial thermocouple has the following kinds: platinum germanium 10 a platinum thermocouple belong to precious metal thermocouple, contain the name of the anode containing germanium 10% of platinum germanium alloy ( SP） , very pure platinum (negative SN) 。 The long using temperature is 1300 OC, short-term use temperature 1600 cC. Physical and chemical performance is stable, strong antioxidant properties. Appropriate in oxidation, continuous use inert environment.