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Instructions For Using Infrared Thermometer


Infrared Thermometer Suppliers share the instructions for using infrared thermometers, I hope it will be helpful to everyone


The principle of infrared thermometer


Infrared radiation is one of the most widespread electromagnetic radiation in nature. Objects have their own molecules and atoms in the irregular motion, and they continuously radiate infrared energy. The higher the temperature of an object, the stronger the irregular movement of its own molecules and atoms, and the greater the radiated energy. On the contrary, the smaller the radiated energy. The size of the infrared radiation energy of an object and its wavelength distribution are closely related to its surface temperature. Therefore, by measuring the energy radiated by the object itself, the surface temperature of the object can be accurately measured, which is the basic principle of the infrared thermometer.


Infrared Thermometer

Infrared Thermometer


The composition of the infrared thermometer


The Infrared Thermometer is composed of optical system, photodetector, signal amplifier, signal processing, display output and other parts.


1.Optical system


Collect the infrared radiation power of the object to be measured, and converge it on the infrared measuring instrument.


2. Photodetector


The infrared radiation is modulated by the modulator and transformed into the corresponding electrical signal output by the detector.


3. Signal processing system


Amplify the measured weak signal to achieve the purpose of displaying and recording the measurement results.


The main parameters of the infrared thermometer


1.Temperature range


Excessive temperature range will increase the cost, and the temperature range is too low. When measuring high-temperature objects, the photodetector of the core part of the infrared thermometer will cause damage.


2. Distance coefficient


That is, the ratio of the distance from the thermometer probe to the target and the diameter of the target being measured.


3. Emissivity


Emissivity is used to measure the ability of an object to radiate infrared rays. It is the ratio of the monochromatic radiance of the actual object to the blackbody at the same temperature and wavelength, also known as the specific emissivity. The emissivity will vary depending on the material, surface, wavelength, and temperature.


The problems that need to be paid attention to when using infrared thermometers


1.The influence of ambient temperature on the measurement results


The change of the ambient temperature will affect the measurement accuracy of the infrared thermometer. When using in an environment with a large difference in ambient temperature, the thermometer should be stabilized for a period of time before using it.


2. The influence of measurement distance on measurement results


According to the distance of the target and the size of the target, a thermometer with an appropriate distance coefficient should be selected for measurement.


3. The influence of emissivity on measurement results


When measuring, different emissivity should be selected for the measuring surface of different objects. The surface emissivity of most organics or metal oxides is between 0.85 and 0.98.


4. The emissivity of smooth metal and polished objects is very low, which is not suitable for measuring temperature with infrared thermometer.


5. The infrared thermometer cannot measure the temperature of the object through the glass.


The company also provides a Portable Infrared Thermometer, if necessary, please feel free to contact us