The working principle and measurement method of infrared thermometer
1, Why use an infrared thermometer?
The infrared thermometer uses infrared technology to quickly and conveniently measure the surface temperature of objects. Quickly measure temperature readings without mechanical contact with the object being measured. Just aim, press the trigger, and read the temperature data on the LCD screen.
The infrared thermometer is lightweight, small in size, convenient to use, and can reliably measure hot, dangerous, or difficult to reach objects without contaminating or damaging the measured object.
The infrared thermometer can measure several readings per second, while the contact thermometer takes several minutes to measure per second.
2, How does an infrared thermometer work?
Infrared thermometers receive invisible infrared energy emitted by various objects themselves. Infrared radiation is a part of the electromagnetic spectrum, which includes radio waves, microwaves, visible light, ultraviolet radiation R-rays and X-rays. Infrared is located between visible light and radio waves, and its wavelength is often expressed in micrometers, with a wavelength range of 0.7 micrometers to 1000 micrometers. In fact, the 0.7-14 micrometer wavelength band is used for infrared thermometers.
3, How to measure temperature with an infrared thermometer?
In order to measure temperature with an infrared thermometer, align the thermometer with the object to be measured, read temperature data on the instrument's LCD using a trigger, and ensure that the ratio of distance to spot size and field of view are arranged properly. There are several important things to remember when using an infrared thermometer:
1. Only measuring surface temperature, infrared thermometer cannot measure internal temperature.
2. Temperature measurement cannot be carried out through glass as it has special reflection and transmission characteristics, and infrared temperature readings are not allowed. But temperature can be measured through an infrared window. Infrared thermometers are not suitable for measuring temperature on bright or polished metal surfaces (such as stainless steel, aluminum, etc.).
3. To locate a hotspot, aim the instrument at the target and then scan up and down on the target until the hotspot is identified.
4. Pay attention to environmental conditions: steam, dust, smoke, etc. It obstructs the optical system of the instrument and affects temperature measurement.
5. The ambient temperature, if the infrared thermometer is suddenly exposed to an ambient temperature difference of 20 degrees or higher, allows the instrument to adjust to the new ambient temperature within 20 minutes.
