A basic infrared temperature sensor, also known as an infrared thermometer or non-contact thermometer, measures surface temperature by detecting the infrared radiation emitted by the object. Every object with a temperature above absolute zero (-273.15°C or 0 Kelvin) emits infrared radiation based on its temperature. The hotter the object, the more infrared radiation it emits.
Here's a general overview of how a basic infrared temperature sensor works:
Infrared Sensor: The sensor in the thermometer is sensitive to infrared radiation. It usually consists of a thermopile or a semiconductor that generates an electrical signal proportional to the amount of infrared radiation it receives.
Optics: The infrared thermometer has an optical system to focus the infrared radiation from the target object onto the sensor. This optical system may include lenses or mirrors.
Emission Target: The user aims the infrared thermometer at the target surface whose temperature they want to measure.
Infrared Radiation Detection: When the infrared radiation from the object hits the sensor, it generates an electrical signal proportional to the intensity of the received radiation.
Temperature Conversion: The electrical signal is then processed by the internal electronics of the infrared thermometer. The device uses a calibration curve or algorithm to convert the electrical signal into a temperature reading.
Display: The final temperature reading is displayed on the screen of the infrared thermometer, usually in degrees Celsius (°C) or Fahrenheit (°F).
It's important to note that the accuracy of the infrared temperature measurement can be affected by various factors, such as the emissivity of the object (a measure of how efficiently it emits infrared radiation), distance from the target, and the presence of any obstructions or background radiation that could interfere with the measurement.
To get accurate readings, it's essential to use the infrared thermometer within its specified distance range and pay attention to the emissivity settings if the thermometer allows adjustments. Additionally, it is essential to follow the manufacturer's guidelines and recommended operating procedures for the specific model of infrared temperature sensor you are using.