What are the features and characteristics of infrared thermometers?

Infrared thermometer is a measuring instrument that uses far-infrared technology to measure temperature, infrared temperature measurement has fast response time, non-contact, safe use and use.

Performance indicators of infrared thermometers.

1. Determine the temperature measurement range: The temperature measurement range is the most important performance index of the thermometer. Each model of thermometer has its own specific temperature range.

Therefore, the user's measured temperature range must be accurate and comprehensive, neither too narrow nor too wide. According to the law of blackbody radiation, the change in radiant energy caused by temperature in the short band of the spectrum will exceed the change in radiant energy caused by the error in emissivity. 2. Determine the target size:

According to the principle, infrared thermometers can be divided into monochromatic thermometers and two-color thermometers (radiometric chromatimetric thermometers). For monochrome thermometers, the area of the measured target should fill the field of view of the thermometer when the temperature is measured. It is recommended that the size of the measured target exceed 50 of the field of view].

If the target size is smaller than the field of view, the background radiant energy will enter the thermometer's visual and acoustic wings to interfere with the temperature reading, causing errors. Conversely, if the target is larger than the field of view of the thermometer, the thermometer will not be affected by the background outside the measurement area. In the case of a two-color thermometer, its temperature is determined by the ratio of the radiant energy within the two independent wavelength bands.

Therefore, when the measured target is small, does not fill the field of view, there is smoke, dust, obstruction in the measurement path, and there is attenuation of radiation energy, it will not have a significant impact on the measurement results. For small, moving or vibrating targets, a two-color thermometer is the best choice. This is due to the small diameter of the light rays, which are flexible and can transmit optical radiant energy on curved, blocked, and folded channels.

3. Determine the distance coefficient (optical resolution): the distance coefficient is determined by the ratio of d:s, that is, the ratio of the distance d between the thermometer probe and the target to the diameter of the measured target.

If the thermometer has to be installed far away from the target due to environmental conditions, and small targets are to be measured, a thermometer with high optical resolution should be chosen. The higher the optical resolution, i.e. the higher the d:s ratio, the higher the cost of the thermometer.

If the thermometer is far away from the target and the target is small, a thermometer with a high distance coefficient should be chosen. For a thermometer with a fixed focal length, the spot is the smallest at the focal point of the optical system, and the spot increases both near and far from the focal point. There are two distance coefficients.

4. Determine the wavelength range: the emissivity and surface characteristics of the target material determine the corresponding wavelength of the spectrum of the thermometer, and for the high reflectivity alloy material, there is a low or varying emissivity. In the high-temperature region, the best wavelength for measuring metal materials is near-infrared, which can be used.

Other temperature zones can be used, and. Since some materials are transparent at a certain wavelength, infrared energy will penetrate these materials, and special wavelengths should be selected for this material. 5. Determine the response time:

Response time represents the speed at which an infrared thermometer reacts to a change in the measured temperature, defined as the time it takes to reach 95] of the energy of the last reading, and is related to the time constant of the photodetector, signal processing circuit, and display system. If the target is moving fast or if measuring a rapidly heated target, use Fast Response Red.

Performance characteristics of the microflow infrared gas analyzer.

2) High sensitivity, can analyze trace gases.

3) The detector has a simple structure and low cost.

4) The detectors can be used in series and are suitable for the simultaneous analysis of multiple components.

5) The detector is not afraid of vibration, and the vibration has no effect on the instrument measurement.

As technology continues to evolve, the optimal design and new advancements of infrared thermometers provide users with a variety of versatile and versatile instruments, expanding the room for choice。In terms of other options, such as ease of use, serviceability and calibration performance, and more.

When choosing the model of the thermometer, the measurement requirements should be determined first, such as the temperature of the measured target, the size of the measured target, the measurement distance, the target material, the environment of the target, the response speed, the measurement accuracy, whether portable or the first type, etc.;

In the comparison of existing thermometers of various models, the instrument model that can meet the above requirements is selected; Choose from a wide range of models that meet these requirements in terms of performance, functionality and **.

The infrared thermometer can quickly and accurately detect small changes in temperature within the measurement range, which plays an important role in equipment inspection and preventive maintenance.

Infrared temperature measurement technology plays an important role in product quality control and monitoring, equipment fault diagnosis and safety protection, and energy saving in the production process. In the past 20 years, the non-contact infrared human body thermometer has developed rapidly in technology, the performance has been continuously improved, the function has been continuously enhanced, the variety has been increasing, and the scope of application has been expanding.

Compared with the contact temperature measurement method, infrared temperature measurement has the advantages of fast response time, non-contact, safe use and long service life. Non-contact infrared thermometers are available in three series: portable, ** and scanning, with a variety of options and computer software, each available in a variety of models and specifications. Among the various models of thermometers of different specifications, it is very important for users to choose the correct model of infrared thermometer.

1.Retek.

Leitai is a subsidiary of Leitai Corporation of the United States and was founded in 1963. It is a world-famous professional manufacturer of non-contact infrared temperature measurement products, and its sales volume ranks first in the same industry in the world.

2.Fluke.

Luck, a Danaher Group company, is a multinational company focused on the manufacture and sale of electronic test tools. Its infrared thermometer is safe, durable, and accurate, and has been in the leading position in the industry.

The AUTO Group is one of the world's leading companies in the field of portable measuring instruments. The company has always aimed at quality and innovation to meet the diverse needs of customers.

Ferrier Filer is a global leader in the design, manufacture and sale of thermal imaging cameras. The company was founded in Sweden and currently exports its products to more than 60 countries around the world.

Like Light American IRCON Corporation, a leading brand of infrared pyrometers and thermometers, has more than 40 years of industry experience, and is now a subsidiary of Fluke in the United States.

6.Unitech University.

Founded in 2003, Unitech (China) is one of the well-known large-scale instrument companies in Asia, and has always insisted on providing high-quality and cost-effective products for global users.

1. raytek

Founded in 1963, Leitai is a world-famous professional manufacturer of non-contact infrared temperature measurement products, and its sales volume ranks first in the same industry in the world.

2. Fluke.

Fluke Corporation, part of Danaher Group, is a multinational company focused on the production and sale of electronic test tools, and its infrared thermometers have been the leader in the industry for safety, durability and accuracy.

3. Teteso.

The Testo Group is one of the world's leading companies in the field of portable measuring instruments, and the company has always aimed to meet the diverse needs of its customers with the aim of quality and innovation.

4. FLIR Filler.

Founded in Sweden, FELIER is a global leader in the design, manufacture and sale of thermal imaging cameras, and is currently sold in more than 60 countries around the world.

5. IRCON loves light.

IRCON is a leading brand of infrared pyrometers and thermometers, with more than 40 years of industry experience, and is now a subsidiary of Fluke in the United States.

6. UNI-T Unilead.

Founded in 2003, Unilead Technology (China) Co., Ltd. is one of the well-known and large-scale instrumentation companies in Asia, and has always insisted on providing high-quality and cost-effective products for global users.

Infrared thermometer can not measure room temperature, infrared thermometer is generally used to measure solid heat source, general molding machine screw temperature, heating circle temperature, human body, etc., infrared thermometer is through the reflected laser beam to sense the temperature.

Problems that should be paid attention to when using infrared thermometers:

1. Only the surface temperature is measured, and the infrared thermometer cannot measure the internal temperature.

2. The wavelength above 5um can not be measured through the quartz glass, the glass has very special reflection and transmission characteristics, and it is not allowed to accurately read the infrared temperature. However, the temperature can be measured through an infrared window. Infrared thermometers are best not used for measuring the temperature of shiny or polished metal surfaces (stainless steel, aluminum, etc.).

3. Locate the hot spot, to find the hot spot, the instrument aims at the target, and then scan up and down on the target until the hot spot is determined.

4. Pay attention to environmental conditions: steam, dust, smoke, etc. It blocks the optical system of the instrument and affects the accurate temperature measurement.

5. Ambient temperature, if the thermometer is suddenly exposed to the ambient temperature difference of 20 or higher, allow the instrument to adjust to the new ambient temperature within 20 minutes.