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A temperature sensor is sort of like a tiny detective that helps us figure out how hot or cold something is. We can see them many places, in our homes, cars, and even all the way into space. Based on the measuring principle, temperature sensors can be divided into two groups: Infrared and Contact temperature sensors.
Infrared Sensors
The way Infrared Temperature Sensor work is they observe the heat objects emit as infrared radiation. They're kind of like a super special pair of glasses that allow us to SEE how hot things are without touching them.
Contact Sensors
Contact temperature sensors measure temperature through direct contact with something. They touch that to see whether it’s hot or cold.
Infrared vs. Contact Temperature Sensor
What are the primary differences between these two sensors? Let's find out.
Infrared Sensors: These sensors can sense temperature from a distance. They can measure the temperature of food on a grill or machines in factories from a safe distance.
Contact Sensors: This kind of sensor works better for measuring the temperature of things you can touch directly — your skin, say, or a cup of hot cocoa.
Locations That We Use Infrared Contact Temperature Sensors
There are many applications where both IR and Contact temperature sensors are used. Infrared sensors are common in factories, farms and hospitals. They can be used to check the temperature of machines, crops, and even if someone has a fever.
They’re in familiar objects like ovens, thermostats and baby bottles. They keep things at the right temperature for us to use them without harm.
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When utilizing temperature sensors, you must take the surface or location being monitored into consideration. Infrared sensors work well for measuring the temperature of things like walls or roads, but they may offer a less accurate measure of the air temperature around them.
Contact sensors are far better for maintaining an accurate read on the temperature in a room. But they happen to be able to tell you how hot or cold it is in the immediate vicinity of where you’re standing or sitting.