Five points of use requirements for handheld infrared thermometers

In the past 20 years, non-contact infrared human body thermometers have made rapid technological development, with continuous improvement of performance, enhancement of functions, increasing variety and expanding scope of application. Compared with contact temperature measurement methods, infrared temperature measurement has the advantages of fast response time, non-contact, safe use and long service life. Handheld infrared thermometers are composed of optical system, photoelectric sensor, signal amplifier, signal processing circuit and LCD display. The optical system gathers the infrared energy radiated from the surface of the object to the photoelectric sensor, which converts the energy into a corresponding electrical signal. The signal is converted into a reading displayed on the LCD through the signal amplifier and signal processing circuit. It is suitable for quickly measuring the surface temperature of various high-temperature, toxic or difficult-to-touch objects. There are five important things to remember when using an infrared thermometer.
1. Ambient temperature. If the infrared thermometer is suddenly exposed to an ambient temperature difference of 20℃ or higher, allow the instrument to adjust to the new ambient temperature within 20min.
2. Only measure the surface temperature of the object. Infrared thermometers cannot measure the internal temperature of objects.
3. Pay attention to environmental conditions. Steam, dust, smoke, etc. will block the optical system of the instrument and affect the temperature measurement. 4. Locate the hot spot. To find the hot spot, first aim the instrument at the target, then scan up and down on the target until the hot spot is determined. 5. Handheld infrared thermometers cannot measure temperature through glass. Glass has very special reflection and transmission characteristics, and temperature readings cannot be taken, but temperature can be measured through the infrared window. Infrared thermometers are not used to measure the temperature of shiny or polished metal surfaces (stainless steel, aluminum, etc.).