The advantages and usage of non-contact infrared thermometer
Non contact infrared thermometers use infrared technology for measurement. During measurement, there is no need to touch the object being measured. Simply aim and press the trigger to quickly and accurately measure the surface temperature, and the measurement data is directly displayed on the LCD screen. Infrared thermometers are lightweight, small in size, easy to use, and can reliably measure hot, dangerous, and other difficult to distinguish objects without contaminating or damaging the object being measured 1. When using a non-contact infrared thermometer to measure temperature, point the non-contact infrared thermometer at the object being measured and press the button. At this time, pay attention to the ratio between distance and measurement area size. The machine is equipped with a laser light for aiming at the object being measured. 2. The object distance ratio (D: S) refers to the ratio of the measured distance to the surface area of the object being measured. When the distance between the non-contact infrared thermometer and the object being measured increases, it is required that the surface area of the thermometer and the object being measured be larger. D:S=12:1 3, The observation range must ensure that the target being measured is larger than the measurement area of the machine. The minimum diameter of the tested area needs to be at least 1.5 square centimeters. 4. The emissivity of most organic materials, as well as paint or oxide materials, is 0.95 (set in the machine). Smooth or polished metal surfaces may result in inaccurate measurements. To compensate, a strip or black paint should be applied to the surface and wait for it to reach the same temperature as the material below before measuring the temperature. 5. Press the battery switch, correctly install the battery, press the switch button to turn on, the LCD displays the battery symbol, temperature value, and the value retention time is about 7 seconds. 6. Select the appropriate distance based on the size of the object being measured, align it with the object, press the button switch, and the LCD will display the temperature value and reading. Several factors that affect the measurement accuracy of non-contact infrared thermometers: 1. Emissivity: The emissivity of a general object surface is 0.95, while the emissivity of other materials can be found in published emissivity tables. 2. Field of view: The ratio of the distance from the infrared thermometer to the object being measured to the size of the measured light spot. 3. Object distance ratio: Ensure that the area of the object being measured is larger than the spot size measured by the infrared thermometer. The smaller the area of the object being measured, the closer it should be to the character. Working principle of infrared thermometer: The infrared thermometer consists of an optical system, a photodetector, a signal amplifier, signal processing, display output, and data analysis. The optical system gathers the infrared radiation energy of the target within its field of view, and the infrared energy is collected on the photodetector and converted into corresponding electrical signals, which are then converted into the temperature value of the measured target.
