The furnace effluent containing these combustion byproducts is directed into a detection chamber where it is excited by high-energy, short-wavelength emission from the excimer source. The UV photons from the excitation source, transfer energy into the SO2 molecule and raise its energy level to create an excited singlet state. These excited molecules rapidly decay back to their lower energy ground state releasing the absorbed energy as a secondary emission known as fluorescence.
SO2 + hν → SO2* → SO2 + hν’
Fluorescence emission is optically filtered to remove undesired wavelengths from excitation source and background scatter within the detector chamber. Detection of filtered fluorescence emission is accomplished using a Photomultiplier Tube and amplified by proprietary high sensitivity electronics.
Calibration and validation routines are seamlessly incorporated into the analyzer’s operation software. The analyzer has a very fast response time to process changes (within 1 cycle), ensuring proper process monitoring with fast moving processes. The sample injection system design is simplified resulting in greater reliability and lower maintenance, for example, the sample valve only actuates once per cycle increasing lifetime. Finally, the analyzer results are insensitive to sample buildup or interference from oxygenates present in the sample stream.
UNSURPASSED NITROGEN INTERFERENCE REDUCTION
Our Excimer UV Fluorescence Technology is much less sensitive to interference from molecular-bound nitrogen, which can significantly affect the accuracy of sulfur measurement depending on the composition of the analyzed samples.
MEETS COMPLIANCE
- Environmental Protection Agency (EPA) – United States
- Canadian EPA (CEPA) – closely aligned with EPA
- European Union Emission Regulations (EU)
- Countries implementing equivalent EU Directives
- Australia
- China
- Israel
- Turkey
- Bharat Stage Emission Standards (BSES) – India
- Ministry of the Environment (MOE) – Japan
Explore our Excimer UVF Lab and Elemental Process Analyzer Solutions.