The ZSS uses a non-dispersive infrared absorbance system which is made up by an infrared semiconductor laser for a light source and a photo-diode for the photo-detection. Measure NH3, HCl, H2O, O2, CO, CO2, and CH4 gas concentrations in a stack at high speed.
The ZSS has a measuring range of 0-15ppm/min. for NH3 and 0-10ppm/min. for HCl over a maximum stack diameter of 32 feet.