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Temperature of the temperature sensor selection considerations

1, the temperature of the measured object is to record temperature sensor, temperature alarm and automatic control, whether you need to distance measurement and transmission;

2, the size of the temperature measurement range and accuracy;

3, the propriety of temperature measuring element size;

4, in the occasion of measured object temperature change over time, the lagging of the temperature measuring device can meet the requirements for temperature measurement;

5, the object to be tested environment conditions on the temperature measuring components for damage;

6 prices, such as insurance, will it be convenient for use.

the classification of the temperature sensor temperature

temperature temperature sensors and contact way of the measured medium is divided into two broad categories: contact and non-contact. Contact temperature sensor temperature need to maintain thermal contact with the measured medium, make sufficient both heat transfer and reach the same temperature. This type of temperature sensor are resistive, thermocouple, PN junction temperature, temperature sensor, etc. Non-contact temperature sensor temperature without contact with the measured medium, but by thermal radiation or convection to the temperature of the measured medium temperature sensor, in order to achieve the purpose of temperature measurement. This type of temperature sensor are mainly infrared temperature measuring temperature sensor. The main characteristic of this method of measuring temperature is to measure motion state the temperature of the material ( Such as slow exercise train bearing temperature, spinning temperature of cement kiln) And the heat capacity of small objects, Such as the temperature distribution in a integrated circuit 。

the temperature of thermal resistance temperature sensor structure

today and share is temperature thermal resistance temperature sensor structure, hope to help you!

end face temperature thermal resistance temperature sensor end face temperature of thermal resistance heat temperature sensor resistance wire winding by special processing, close to the face in the thermometer, it is compared with general axial temperature thermal resistance temperature sensor, can more accurately and quickly to reflect the actual temperature of end face, is suitable for measuring temperature bearing and other parts of the face.

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temperature temperature sensor how to avoid the error of

1, the error of the insulation deterioration and introducing

such as thermocouple insulation, protection tube and wire plate too much dirt or salt slag between the thermocouple interelectrode and wall insulation fault, at high temperatures is more serious, which not only causes the thermoelectric potential loss but also can introduce interference, the resulting error sometimes can reach hundreds of degrees Celsius.

2, thermal inertia is introduced into the error of the

because of thermocouple thermal inertia instrument behind the change of the measured temperature, indicating value of this influence is particularly acute in rapid measurement. So should be used as thermal electrode is small, small thermocouple protection tube diameter. Temperature measuring environmental permits, even protecting tube can be taken. Due to measurement lag, using thermocouples detect temperature fluctuations of the amplitude of the furnace temperature fluctuation amplitude of the small. Measurement lags behind, the greater the fluctuation amplitude of the thermocouple is smaller, and the actual temperature difference.