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Technical parameters of Changzhou Ousike high-voltage micro thermocouple
Changzhou OSCO specializes in the production of direct micro thermocouples, the price is reasonable and transparent, and the country can be shipped. This is a kind of armored thermocouple is even smaller, more flexible, high pressure resistance, thermal response time and durable advantages, micro thermocouple and armored thermocouple and assembly thermocouple, as a temperature measurement sensor, usually micro thermocouple and display instrument, recorder and electronic regulator supporting use, at the same time, The micro thermocouple can also be used as the temperature sensing element of the fabricated thermocouple.1. Product parametersIn order to ensure the reliable and stable operation of the thermocouple, its structural requirements are as follows:1. The welding of the two thermal electrodes of the thermocouple needs to be firm;2, the two thermal electrodes should be well insulated from each other to prevent short circuit;3, the compensation wire and the free end of the thermocouple connection should be convenient and reliable;4, the protective sleeve should be able to ensure that the thermal electrode and harmful media are fully isolated.2. Classification by type of fixed deviceThermocouple as the main means of temperature measurement, the use is very wide, so there are a variety of requirements for the fixed device and technical performance, so the fixed device of the thermocouple is divided into six kinds: no fixed device type, threaded type, fixed flange type, movable flange type, movable flange square form, cone protection tube type six kinds.3. Classification by assembly and structureAccording to the performance and structure of the thermocouple, it can be divided into: detachable thermocouple, flameproof thermocouple, armored thermocouple and pressure spring fixed thermocouple and other special purpose thermocouples.In addition to the above sharing of product parameters, micro thermocouples work by welding conductors or semiconductors A and B of two different materials together to form A closed loop, when there is a temperature difference between the two attachment points 1 and 2 of conductors A and B, electromotive force is generated between the two, thus forming a size of current in the loop, this phenomenon is called the thermoelectric effect. Thermocouples work by exploiting this effect.Changzhou Osike factory direct sales of micro thermocouple, no middleman, buyers do not need to pay for layers of agents, micro thermocouple price is reasonable, flexible, high pressure resistance, fast response time, to meet customer needs.
Temperature sensor K-type thermocouple, the manufacturer's supply is of excellent quality
With the rapid development of industry, K type thermocouples, thermocouples, platinum rhodium thermocouples, armored thermocouples produced by manufacturers are more and more widely used in production, thermocouples have become one of the most commonly used temperature detection components in industry, which has high measurement accuracy, wide measurement range, simple structure, easy to use and other characteristics. We understand and analyze products through a variety of channels, and present a wide range of industry knowledge for the majority of users.Then let's understand the temperature range and advantages and disadvantages of K thermocouples.K type thermocouple material is mainly composed of nickel-chrome-nickel-silicon alloy, the nominal chemical composition of the positive electrode (KP) is: Ni: Cr= 90:10, the nominal chemical composition of the negative electrode (KN) is: Ni: Si= 97:3, it is a thermocouple that can measure higher temperatures with high cost performance, is the most commonly used thermocouple in industrial automation control. Due to its high temperature oxidation resistance, NicHCR - NicSi alloy can be used in oxidizing or neutral media. Therefore, this type K thermocouple can measure the high temperature of 1000 degrees in the long term, and can measure up to 1200 degrees in the short term. However, it cannot be used in reducing media, otherwise it will soon be corroded and damaged, in this case it can only be used for measurements below 500 degrees. It is much cheaper than the S-type thermocouple, its repeatability is good, the thermoelectric potential generated is large, so it is very sensitive, and its linearity is very good. Although its measurement accuracy is slightly lower, it can fully meet the requirements of industrial temperature measurement, so it is the most commonly used thermocouple in industry.In summary, the K-type thermocouple has three main advantages:1. Good straightness of thermoelectric motive force.Good oxidation resistance below 2.1000℃.3. In the splash metal thermocouple safety is good.Type K thermocouple has the following four disadvantages:1. Not applicable to reductive gas environment, especially carbon monoxide, sulfur dioxide, hydrogen sulfide and other gases.2. The thermoelectric motive force changes when compared with the precious metal thermocouple It's larger.3. Errors will occur under the influence of Greem rot.4. You're susceptible to the resume phenomenon.Changzhou OSCO to provide you with free technical consulting services, is a good reputation of K-type thermocouple manufacturers, national delivery, and ensure good quality, your quality choice.
What is the function of the compensation wire?
Changzhou Osco manufacturers straight compensation wire price is excellent. What is a compensating wire? The compensation wire is a pair of conductors with an insulating layer that have the same nominal value of the thermoelectric motive force of the matching thermocouple within a certain temperature range (including room temperature 0), and use them to connect the thermocouple and the measuring device to compensate for the error caused by the temperature change at the connection between them and the thermocouple. After knowing what is the compensation wire, what is the role of the compensation wire? What are the problems to pay attention to when using compensation wires?Compensation wire action:1), conducive to the thermocouple reference end temperature correction and centralized control.The measuring instrument is generally installed away from the heat source and the ambient temperature is stable, and the junction box of the common thermocouple (where the reference end is installed) is very close to the measured object. The reference end of the thermocouple must be connected to the instrument by wire. If the thermocouple is connected with ordinary copper wire, the reference end temperature is high and unstable, which brings error to the measurement. If the thermocouple is extended so that the reference end of the thermocouple is away from the heat source, it is theoretically possible, but it will cause waste of thermal electrode materials. Compensation wire is produced to solve this contradiction. It is characterized by a thermocouple composed of two poles of the compensation wire within the possible range of change in the reference end temperature (0-100 ° C or 0-150 ° C) whose thermoelectric characteristics are the same as those of the matched thermocouple, namely:Ea'b' (tn, 0) =Eab (tn, 0)According to the law of intermediate temperature, after the thermocouple loop is added with the compensation wire, its thermoelectric potential is only related to the temperature t at the measuring end and the compensation wire is connected to the instrument t0, and is unrelated to the change of the reference end temperature tn, just like the thermal electrode is extended to the instrument, so the role of the compensation wire is only to extend the thermocouple, it can not eliminate the influence of the reference end temperature is not 0℃. Therefore, it is necessary to use methods such as 0℃ thermostat method, calculation method, instrument automatic compensation method, etc., to correct the reference temperature of the thermocouple to 0℃.2), can save a lot of expensive metal materials, such as platinum rhodium 10-platinum thermocouple, can choose the family copper-nickel copper compensation wire.Thermocouple special wire, compensation wire welcome to consult OSCO manufacturers, to provide you with strong stability, high temperature resistance, low temperature resistance, wear resistance, flame retardant compensation wire, beautiful price, call for details.