 Nondispersive infrared sensor

A Nondispersive Infrared (NDIR) sensor is a type of gas sensor that measures the concentration of specific gases by detecting the infrared radiation absorbed by those gases. NDIR sensors operate on the principle that different gases absorb infrared light at specific wavelengths. Here’s how they work: 1. **Infrared Source**: The sensor consists of an infrared light source (usually an LED or infrared lamp) that emits light over a spectrum that includes the wavelengths corresponding to the gases of interest.