Questions and answers about infrared thermometers How to operate the thermometer
Q: Some of the lens materials of infrared thermometer products are made of optical glass, and some are made of plastic. What is the difference?
Answer: The advantage of using plastic lenses is that the cost is low, but the lens is greatly affected by temperature, and it is easy to age and deform to affect the accuracy. Moreover, it is not easy to clean and maintain when the plastic mirror surface is dirty. The thermometer with a plastic lens should avoid measuring and close to high-temperature objects. The thermometer with optical lens has high precision and is suitable for occasions with harsh environments. It can be used in various high and low temperature occasions and is easy to clean and maintain.
Q: What is the difference between laser aiming and telescope aiming?
Answer: These are the two commonly used aiming methods for infrared thermometers. High-temperature objects are suitable for telescope aiming, and medium and low temperature measurements are suitable for laser aiming. The red laser point for laser aiming is very convenient for aiming at objects and has a wide range of applications. But for the high-temperature objects with thousands of degrees, because most of the objects themselves emit red light, the laser dots on the objects cannot be seen clearly, so the telescope aiming method should be used in high-temperature occasions.
Q: What should be paid attention to when choosing the measuring range of infrared thermometer?
Answer: Like any testing equipment, in actual use, try to use the middle of the instrument's range and avoid using both ends of the range, so that the instrument can be used reliably and stably. When measuring high temperature objects, choose an infrared thermometer with a short wavelength of 0.9 ~ 2.5 μm as much as possible, which can measure more stably and accurately!
Q: How to ensure the accuracy of temperature measurement?
Answer: A complete understanding of infrared technology and its principles is the basis for accurate temperature measurement. When using a non-contact device to measure temperature, the infrared energy emitted from the object to be measured passes through the optical system of the thermometer or thermal imager and is converted into an electrical signal by the sensor. This signal is then displayed as a temperature reading and/or thermal image. Several factors determine measurement accuracy. The more important factors are emissivity, distance and field of view.
Q: What is the principle of infrared measurement?
A: Infrared thermometers capture the infrared energy radiated from all objects. Infrared radiation is part of the electromagnetic spectrum, which includes radio waves, microwaves, visible light, ultraviolet light, gamma rays, and X-rays.
Infrared light falls between the spectrum of visible light and radio waves. Infrared wavelengths are usually expressed in microns, and the infrared spectrum ranges from 0.7 to 1000 microns. In practice, infrared temperature measurements use a wavelength range from 0.7 to 14 microns.
Q: What is the working principle of infrared thermometer?
Answer: Infrared thermometer is composed of optical system, photodetector, signal amplifier, signal processing, display output and other parts. The optical system gathers the infrared radiation energy of the target in its field of view, and the infrared energy is gathered on the photodetector and converted into a corresponding electrical signal, which is then converted into the temperature value of the measured target.
