Infrared Temperature Sensor Selection

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  Infrared Temperature Sensor

Infrared temperature sensor is the use of natural objects emitted by the different bands of heat and thus made an advanced tool, in the current production life we often use him, especially scientific research using infrared temperature sensors can greatly help us to reduce the difficulty of operation. So, do you know what are the main applications of infrared temperature sensors?

In nature, when the temperature of the object is higher than absolute zero, due to the existence of its internal thermal movement, it will continue to radiate electromagnetic waves to the surrounding area, which contains infrared wavelengths located in the 0.75 ~ 100μm, infrared temperature sensors are made using this principle.

Temperature is a physical measure of the degree of hot and cold objects, is very common in industrial production, a very important thermal parameter, many production processes are required to monitor and control the temperature, especially in the chemical industry, food and other industries in the production process, the measurement and control of the temperature has a direct impact on the quality and performance of the product.

Selection Points

Mainly from the performance indicators and environmental and working conditions to be considered.

Performance Indicators: First of all, the range is the temperature measurement range, the choice of infrared temperature sensor must be aware of its range, only the selection of the appropriate range in order to better measurement. The user's measured temperature range must be considered accurately and thoroughly, neither too narrow, nor too wide. The second is to pay attention to the size of the sensor, can not choose too large or too small, you must choose the right size to better facilitate the measurement, the range and size is the choice of sensors are to pay attention to, but the choice of infrared temperature sensors but also to determine the optical resolution, to determine the range of wavelengths, to determine the response time, the signal processing function and so on.

Working Conditions: The environmental conditions in which the infrared temperature sensor is located have a great influence on the measurement results, and should be considered and properly resolved, otherwise it will affect the accuracy of temperature measurement or even cause damage to the pyrometer. When the ambient temperature is too high, the presence of dust, smoke and steam conditions, the manufacturer can choose to provide the protective sleeve, water cooling, air cooling system, air blowers and other accessories. These accessories can effectively solve the environmental impact and protect the pyrometer to achieve accurate temperature measurement.

The application of infrared temperature sensor:

1. Application in Paint Spraying： The infrared temperature sensor will be able to measure the temperature of the sprayed surface in time to determine the reasonableness of the spraying process. For general sensors, please make sure that the ambient temperature does not exceed 60℃. Often these products require a built-in blowing system to ensure that the sensor lens is clean. And the ambient temperature can be further increased.

2. Application in a Vapour Environment: In the paper or metal processing treatment process, the measured body will usually have steam constantly evaporating. General infrared temperature sensor because of its steam and make the lens condensation water mist affects the measurement accuracy, at the same time, the water vapour is wavelength range and the actual wavelength of the body to be measured there is a difference, in view of this situation, Guangzhou Huahong provides a gas blowing device, which can be the sensor measurement area of the vapour blowing away, as shown in the figure below, so that it can be measured by the measured surface temperature of the body.

3. Application in Bearing Failure Analysis: In large mechanical equipment such as generators, such as the motor spindle transmission power of 750KW, when the power loss reaches 0.1 per cent, the temperature of the bearings will rise rapidly. When the infrared temperature sensor is used to monitor the bearing temperature, it will be able to determine the state of the spindle whether the friction increases or failure occurs, etc.. By using two infrared temperature sensors, one to measure the spindle temperature and the other to measure the bearing temperature, if the difference between the two temperatures is too large, then the equipment overhaul procedure is carried out.

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