What is Infrared Temperature Sensor and applications

What is an Infrared Temperature Sensor？

Non-contact infrared temperature sensors, usually using a thermal or photodetector as the sensing element. This type of temperature measurement system is relatively simple and can be used for temperature measurement over large areas or at specific points on an object.

Infrared temperature sensors can be portable or fixed and are easy to use. The manufacturing process is simple and low cost. It is not in contact with the measured object during temperature measurement, and has the advantages of short response time, no interference with the measured temperature field, long service life, and easy operation. However, when using infrared temperature measurement sensors, they are inevitably affected by external factors such as object emissivity, measurement distance, smoke and water vapour, resulting in relatively large measurement errors.

However, when utilizing infrared radiation for temperature measurement, factors like object emissivity, measurement distance, smoke, and water vapor can introduce measurement errors.

Based on different temperature measurement principles, infrared temperature sensors are designed using three methods:

1. Full Radiation Temperature Measurement Method: Determines the object's radiative temperature by measuring the full wavelength thermal radiation of the radiating object.

2. Brightness Temperature Measurement Method: Determines the brightness temperature by measuring the monochromatic radiation brightness of the object at a specific wavelength.

3. Colorimetric Temperature Measurement Method: Determines the temperature by observing the ratio of monochromatic radiation brightness of the measured object at two wavelengths as it changes with temperature.

The choice of method depends on specific application scenarios and requirements. In general, infrared temperature sensing offers numerous advantages, but users should be mindful of potential measurement errors due to external factors.

Industrial applications of infrared thermometer

Electric power: coal-fired power plants, gas heating power plants, hydroelectric power plants, nuclear power plants, district heating pipe network, temperature protection and signal transmission of large power transformers, etc.

Metallurgy: aluminium plant, copper plant, steel plant, etc.

Petrochemical: oil extraction, oil pipelines, petrochemical plants, oil refineries.

General industry: freezer factory, air-conditioning factory, refrigerator factory, brewery, pharmaceutical factory, automobile factory.

Temperature components manufacturing plant: platinum resistance, thermocouple and compensation wire cable, temperature switch, temperature sensor manufacturing plant.

Transport: aircraft maintenance at airports, large transport power system maintenance, ocean shipping as a means of in-service maintenance measurement.

1.infrared temperature sensors in the steel industry applications

The use of infrared thermometers in the steel industry is very common, because steel plates are in motion, and the temperature is generally very high, not applicable to contact measurement. Infrared thermometers can be used for everything from molten iron, to rolled plate, to strip. Reheating steel at a stable temperature is an important factor in preventing it from deforming, so infrared thermometers can be used to measure the internal temperature of the return heaters. In high-temperature rotary mills, infrared thermometers can be used to monitor whether the product temperature is within a reasonable range. In silicon steel production wires, infrared thermometers can be used to measure the temperature of the strip at the exit of the homogenising section.

2. Application of infrared thermometer in glass industry

In the glass industry, products are also in motion and require very high temperatures to melt the glass. At this time, the infrared thermometer can be used to monitor the temperature in the furnace and adjust the temperature of the furnace mouth by measuring the temperature of the molten glass. In the process of producing flat glass products, the temperature must be strictly controlled in each process. Too fast temperature changes or incorrect control will affect the quality of the product. For bottle container products like glass, the molten glass will flow into the front furnace. At this time, an infrared thermometer can be used to measure the temperature of the front furnace glass, so that the status of the furnace can be monitored. In the windshield product process, the application of infrared thermometers is also very common.

3.infrared thermometer applications in the plastics industry

In the plastics industry, infrared thermometers can be used to measure the temperature of dynamic objects and plastics to avoid product tarnishing. In the blown film spraying process, in order to maintain the integrity of the plastic and the thickness of the temperature should be strictly controlled, then the infrared thermometer can monitor the temperature, so that operators to adjust the heating and cooling. Infrared thermometers can also be used to measure the temperature during the ejection of thrown film. When the film is pressed out, the temperature value measured by the infrared thermometer allows the operator to adjust the heater and the cooling roll to ensure the quality of the product.

Benefits of Infrared Temperature Transmitters:

The applications of infrared temperature transmitters bring forth various benefits that cater to different industries. Some common advantages include:

1. Non-contact measurement: By eliminating the need for physical contact, infrared temperature transmitters minimize the risk of contamination and damage to sensitive equipment.

2. Greater accuracy: These transmitters offer precise temperature measurements, ensuring reliable data for process control, maintenance, and troubleshooting.

3. Time and cost savings: Infrared temperature transmitters provide instantaneous temperature readings, reducing the time required for manual measurements. This increases productivity while saving costs associated with labor.
 

Conclusion

Infrared temperature Sensor have indeed revolutionized temperature measurement techniques in various industries. Their non-contact measurement capability, accuracy, efficiency, and convenience make them indispensable tools for ensuring proper temperature control, preventing equipment failures, and optimizing processes. From industrial facilities to automotive plants, medical facilities to building management systems, these transmitters continue to prove their worth in diverse applications. As technology advances, we can expect further enhancements and integration of infrared temperature transmitters, continuing to shape the future of temperature monitoring.

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