Seitron S9000 IR sensor – NDIR Infrared Bench Sensor Option (CO2 NDIR, CxHy HC NDIR, High CO NDIR)

CO2 NDIR Sensor (0-50%), CxHy HC NDIR Sensor (0-100,000ppm) $ 3,250 and High CO NDIR Sensor (0-50%)

An infrared bench for the detection of gases based on (NDIR) infrared spectroscopy can be installed on S9000.

By this system, it is possible to simultaneously detect CO, CO2 and CxHy.

An additional dust filter is fitted along the pneumatic circuit before the IR bench.

The principle is the (NDIR) nondispersive infrared absorption at two wavelengths, stability over time, no interference with other compounds of the process, very fast response and quick return to zero value even after measuring concentrations up to the maximum measurement limit.

Gases absorb light at specific wavelengths, typically in the IR. An NDIR system includes an IR light source, a chamber that contains the gas sample to be analyzed and a detector equipped with an optical filter. The light goes through the chamber and the gas sample will absorb it at a specific wavelength (i.e. 4.26μm for CO2) or in specific bands.

The filter is the nondispersive optical component that allows the detector to unequivocally identify the gas according to the absorption spectrum pattern. The narrower the filter bandwidth the higher is the specificity of the sensor. The intensity of light (at a specific wavelength) that reaches the detector is inversely proportional to the relevant gas concentration. The signal picked up by the detector is then processed by the downstream electronics in order to have the concentration of CO, CO2 or CxHy.