NDIR CO2 Sensor CO206

good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
Feature:

* High sensitivity, low power consumption
* Good stability
* Temperature compensation, excellent linear output
* Multiple output modes: UART, PWM
* Long lifespan
* Anti-water vapor interference, anti-poisoning

Working principle


The NDIR carbon dioxide sensor uses a broad spectrum light source as the source of the infrared sensor. Light passes through the measured gas in the optical path and passes through a narrow-band filter to reach the infrared detector. Its working principle is a gas sensing device that selects absorption characteristics of different gas molecules based on near infrared spectroscopy, and uses the relationship between gas concentration and absorption intensity (Lambert-Beer law) to identify gas components and determine their concentrations. The optical sensor is mainly composed of infrared light source, optical path, infrared detector, circuit and software algorithm