1. What is an infrared thermometer?
(1) Working principle:
The non-contact infrared thermometer is composed of an optical system, a photodetector, a signal amplifier, signal processing, and display output. The optical system gathers the infrared energy radiated by the target object, focuses on the photodetector, and converts it into a corresponding electrical signal, and then converts it into a linear temperature signal value of the measured target after passing through the circuit operation and processing circuit. In order to achieve further signal processing and control.
(2) Infrared principle:
As long as the temperature of any object is higher than zero (-273°C), it will emit thermal radiation to the outside. The temperature of the object is different, the energy it radiates is also different, and the wavelength of the radiation wave is also different, but it always contains infrared radiation. In addition, for objects below 1,000 degrees Celsius, the strongest electromagnetic waves in their thermal radiation are infrared waves, so the measurement of the object's own infrared radiation can accurately determine its surface temperature, which is the objective basis of infrared thermometers for temperature measurement. Base.
2. What are the classifications of infrared temperature measuring instruments?
(1) Infrared thermal imager,
(2) Infrared thermal TV,
(3) Infrared thermometer (spot thermometer, infrared thermometer).
3. Why use a non-contact infrared thermometer/infrared thermometer?
Non-contact infrared thermometers use infrared technology to quickly and easily measure the surface temperature of objects. Quickly take temperature readings without the need for mechanical contact with the measured object. Just aim, press the trigger and read the temperature data on the LCD display. Infrared thermometers are lightweight, small, and easy to use, and can reliably measure hot, dangerous, or hard-to-reach objects without contaminating or damaging the object being measured. Infrared thermometers/infrared thermometers can take several readings per second, while contact thermometers take several minutes per second.
4. How does the infrared thermometer work?
Infrared thermometers/infrared thermometers receive invisible infrared energy emitted by a variety of objects themselves. Infrared radiation is part of the electromagnetic spectrum, which includes radio waves, microwaves, visible light, ultraviolet, R-rays and X-rays. Infrared is located between visible light and radio waves. The infrared wavelength is usually expressed in microns, and the wavelength range is 0.7 microns to 1000 microns. In fact, the 0.7 microns to 14 microns band is used for infrared temperature measurement.
5. How does an infrared thermometer measure temperature?
In order to measure the temperature, point the instrument at the object to be measured, press the trigger to read the temperature data on the LCD of the instrument, and ensure that the ratio of distance and spot size, and the field of view are arranged.
There are a few important things to remember when using an infrared thermometer/infrared thermometer:
(1) Only the surface temperature is measured, the infrared thermometer/infrared thermometer cannot measure the internal temperature.
(2) The temperature cannot be measured through the glass. The glass has very special reflection and transmission characteristics, and infrared temperature readings are not allowed. However, the temperature can be measured through the infrared window. Infrared thermometers/infrared thermometers are not intended to measure the temperature of shiny or polished metal surfaces (stainless steel, aluminum, etc.).
(3) Locate the hot spot. To find the hot spot, the instrument should aim at the target, and then scan the target up and down until the hot spot is determined.
(4) Pay attention to environmental conditions: steam, dust, smoke, etc. It blocks the optics of the instrument and affects the temperature measurement.
(5) Ambient temperature, if the thermometer is suddenly exposed to an ambient temperature difference of 20 degrees or more, allow the instrument to adjust to the new ambient temperature within 20 minutes.
6. What are the most common applications of infrared thermometers/infrared thermometers?
There are many applications for non-contact infrared thermometers/infrared thermometers, the most common are:
(1) Automotive industry: Diagnose cylinders and heating/cooling systems.
(2) HVAC: Monitor air stratification, supply/return recording, and furnace performance.
(3) Electrical: Check for faulty transformers, electrical panels and connectors.
(4) Food: Scanning management, service and storage temperature.
(5) Others: many engineering, base and renovation applications.
