Chemiresistor

A chemiresistor is like a special guard dog that can smell things that humans can't. Just like how a dog can bark when it smells danger, a chemiresistor can change its behaviour when it smells different chemicals in the air.

The chemiresistor is made up of a special material that can react to different chemicals. When a chemical comes in contact with the material, it causes a change in the electrical properties of the material. This change is then detected by the chemiresistor and it can tell us what chemical it is smelling.

This technology can be used to make devices like air quality sensors that can detect harmful chemicals in the air, or even devices that can detect substances in our blood or urine.

So, just like how a guard dog can alert us to potential danger, a chemiresistor can alert us to the presence of different chemicals, making our lives safer and healthier.