Pulsed fluorescence technology is used to detect sulfur dioxide (SO2) molecules formed by the catalytic conversion of hydrogen sulfide (H2S). SO2 molecules are excited by ultraviolet light and then decay to a lower energy state producing a characteristic light that is measured by a photomultiplier tube. The pulsing of the source lamp increases the optical intensity through which greater UV energy through put and lower detectable SO2 concentrations are realized. Reflective bandpass filters on the model 450i are more selective in wavelength isolation, minimizing photochemical degradation.
Pulsed excitation and intensity stabilization
Reflective bandpass filters
Temperature stabilization reaction chamber
Stable, long-life UV source
Superior zero stability
Ethernet connectivity for efficient remote access
Enhanced user interface with one button programming and large display screen
Flash memory for increased data storage and user downloadable software
Enhanced electronics design optimizes product commonality
Improved layout for easier accessibility to components
Choose from the following options/configurations to customize:
Voltage options:
  A: 115VAC 50/60Hz
  B: 220/240VAC 50/60Hz
  J: 100VAC 50/60Hz
Internal zero/span:
  N: No zero / span valve
  Z: Internal zero span assembly
  P: Internal permeation span source with zero/span assembly
Sample handling:
  S: Standard plumbing (standard)
  E: External Converter Setup (no converter supplied)
  H: Selective SO2 Scrubber (Continuous H2S Analysis only)
Optional I/O:
  A: None (standard)
  C: 0-20, 4-20mA current output - 6 channel, 0-10V analog input - 8 channel
Mounting hardware:
  A: Bench mounting (standard)
  B: Ears and handles, EIA
  C: Ears and handles, retrofit
Compliance: ETL, CSA, UL, CE