Thermocouple temperature instrument which problems need to pay attention to the choose and buy1

The temperature of the thermocouple is a common instrument in many of the industry has a certain application. Users at the time of purchase of thermocouple temperature instrument is must pay attention to four aspects, because the stand or fall of thermocouple choose contact thermocouple measurement is important, so the choice of the thermocouple in the users is very important.

the following project will introduce thermocouple temperature instrument of choose and buy must pay attention to four aspects.

1, the index number:

the first thing you should consider when buying thermocouple to measure how much is the temperature range. Different degree, number of measured temperature is also limited. If you measure temperature at 500 ℃ can choose k type index number, E index can also.

2, response time:

if you need a faster thermal response time. Can choose according to the working end of the shell mold, is characterized by fast response speed, service life is long, but this does not apply to places that have requirements of electromagnetic interference temperature measurement. If you need to electromagnetic interference resistance and long service life, your choice of the type of insulation.

3, installation method:

thermocouple temperature instrument installation on site is very important, when you choose to use a thermocouple, must know your job site have any existing device, if must provide, can according to your device on the thermocouple welding corresponding device at the scene.

outside the thermocouple protection tube material: thermocouple protection tube outside a lot of materials to choose from, depending on what we need in the environment and the medium temperature measurement. Many enterprises due to various reasons will put the thermocouple directly in the material and temperature ( This is normal) , and the corrosive materials is not very strong, so in this case, you have to explain.

now we all know the thermocouple must pay attention to the aspects of the choose and buy, degree good, response time, installation method, thermocouple protection tube material, these points are user thermocouple must pay attention to the choose and buy, after the user at the time of purchase thermocouple can refer to the above content to make their purchases.

4, what are the connection mode of the temperature sensor

temperature sensor is a kind of common measuring instrument, the application of industry is also very much. Temperature sensor is a kind of temperature variables into a transmission temperature meter, it is mainly used for industrial process measurement and control of the temperature parameters. But the connection mode of the temperature sensor are different, so what are the connection mode of temperature sensor, let below small make up on detailed introduction.

temperature sensor according to the power supply connection mode can be divided into two wire system and four wire system, two kinds of connection mode. In use process, the temperature sensor according to different standards, the connection mode of the temperature sensor is different.

sensor with electric unit combination instrument series and miniaturization of modular, multi-functional intelligent. The former were without sensor, after two sensors can be convenient and the thermocouple or heat resistance sensor with sensors.

usually consists of two parts: sensor and signal converters. The sensor is mainly the thermocouple or heat resistance; Signal converter mainly consists of measurement unit, signal processing and conversion unit ( Due to industrial heat resistance and thermocouple indexing table is standardization, so as independent products, also known as the sensor signal converter) And some sensors increases the display unit, some also have the function of field bus.

if the sensor is composed of two sensors used to measure the temperature difference, the output signal and the temperature difference between a given continuous function relationship. So called temperature sensor. The sensor output signal and the temperature variables (a given continuous function relationship between Usually in the form of linear function) , the early production of the sensor output signal and the temperature sensor resistance ( Or voltage value) A linear function relationship between. The output signal of standardization is 0 ma ~ 10 ma ma and 4 ~ 20 ma ( Or 1 v to 5 v) The dc signal. Do not rule out other standardized output signal with special provisions.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor