Fulfils European Norm ISO 10498:2004, has Certification from US/EPA and is aligned with Norm EN 14212:2005. "Standard method for the measurement of the concentration of Sulphur Dioxide by Ultraviolet Fluorescence"

UV Lamp extended life.
Automatic Temperature and Pressure Correction
Concentrations in ppb, mg/m3, ppm.
Autorange or operator adjustable.
Modular Electronics common with SIR
Models:
     -S-5012 NOx.

     -S-5014 O3.
     -S-5006 CO.

     -S-5000 Multi-Gas Calibrator.
Automatic zero correction.
External Sensors can be logged, data can be: stored and presented in graphical and tabulated formats.
Electronic Diagnostic Transducers.
Internal Datalogger and Memory.
Graphical Screen with simultaneous presentation of Concentrations and
Diagnostics.
Bi-directional Communication for External Control, “RS232/RS485”.
Calibration: manual, automatic and remote.
Dedicated Menus and Graphical Screen allowing total external control:
    ·Configuration

    ·Diagnostics
    ·Calibrations

    ·Data History
    ·Graphics

    ·Alarm History
    ·Zero/Span

    ·Test of elements
Powerful Calibration and Maintenance Menus (protected by password).
Calibration not only for the pollutans but also for internal electronics of functional parameters.
Multi-tasking software allows viewing test variables while operating.
Adaptive filtering selectable.
Continuous self checking with warning alarms and table of alarms history.
Signals Generation for checking Data Acquisition Channels.
Options:

    · PCMCIA Board.
    · Internal Span.
    · H2S Measurement.

SIR Model S-5001 is a Non-Pulsed U.V. Fluorescence Sulfur Dioxide Analyzer. In the analyser, optically filtered pure monochromatic U.V. light from a Zinc lamp is focused onto the SO2 reaction chamber. This beam is of invisible U.V. light and is termed the excitation beam or sometimes the "primary beam". The intensity of the beam is directly viewed by the primary beam intensity measuring detector (control detector). The same beam is viewed at right angles by a wavelength selective photomultiplier (PM) detector which is tuned by an optical discrimination filter to reject the primary beam radiation, but to be sensitive to radiation in a discrete portion of the visible spectrum. SO2 molecules intercepting the primary beam are U.V. energized through primary beam light absorption. These excited molecules "de-energize" themselves by re-emitting light at a higher wavelength (lower energy). The re-emitted light is given off in all directions, and a portion of it, the secondary beam, is viewed through the primary beam "blocking" filter by the photomultiplier detector.

Model S-5001uses non-pulsed U.V. radiation, which effectively doubles the detected signal as compared to a chopped light instrument, thereby significantly increasing the signal-to-noise ratio. The usual task of correcting for PM and control detector dark current normally performed by light pulsing is achieved by a microprocessorcontrolled shutter system which periodically and momentarily blocks the primary beam. This blocking is done over a short time
interval relative to the non-blocked time.

All functions of Model S-5001 are under microprocessor control, and the SO2 concentration is obtained by microprocessor computation of stored averaged values that contain information relative to the detector dark currents, scattered light values, total fluorescence signal, and lamp intensity. By making use of a sophisticated microprocessor program, the normal zero drift inherent to most SO2 monitors is factored out by DYNAMIC ZERO STABILIZATION (DZS), a
technique which correlates background radiation to source intensity changes and corrects for them by a microprocessor ratioing technique. Similarly, span
drift is made virtually non-existent through the monitoring of source intensity and the use of the DZS technique resulting in an instrument of remarkable stability.