Nondispersive infrared sensor
A nondispersive infrared (NDIR) sensor is a little device that can tell what kind of gas is in the air around it by using infrared light. Think of it like shining a flashlight, but instead of seeing things with your eyes, the NDIR sensor can detect gases.
You know how when you turn on a stove, you see a blue flame? That's because it's burning gas. That gas gives off a special type of light that can't be seen by our eyes – it's called infrared light. NDIR sensors can detect this infrared light and use it to figure out what type of gas is in the air.
The way it works is that the NDIR sensor has a little chamber where the gas can go into. When the gas is in there, the NDIR sensor shines a beam of infrared light through the chamber. The gas molecules absorb some of that light and change it slightly. Then the light goes through a filter and into a detector that can tell what type of gas is in the air based on the changes that the gas made to the light.
NDIR sensors are important because they can help people stay safe from harmful gases. For example, if there's too much carbon dioxide in the air, NDIR sensors can detect it and sound an alarm to alert people to take actions to stay safe. That's why they're used in lots of places like factories, airplanes, and even in your house to keep you safe.
You know how when you turn on a stove, you see a blue flame? That's because it's burning gas. That gas gives off a special type of light that can't be seen by our eyes – it's called infrared light. NDIR sensors can detect this infrared light and use it to figure out what type of gas is in the air.
The way it works is that the NDIR sensor has a little chamber where the gas can go into. When the gas is in there, the NDIR sensor shines a beam of infrared light through the chamber. The gas molecules absorb some of that light and change it slightly. Then the light goes through a filter and into a detector that can tell what type of gas is in the air based on the changes that the gas made to the light.
NDIR sensors are important because they can help people stay safe from harmful gases. For example, if there's too much carbon dioxide in the air, NDIR sensors can detect it and sound an alarm to alert people to take actions to stay safe. That's why they're used in lots of places like factories, airplanes, and even in your house to keep you safe.