PI-200 Online Raman System

PI-200 Online Process Raman System

The Raman instruments incorporate a frequency stabilized, narrow linewidth diode laser (Patent No. 6,100,975); a temperature controlled, optically fast ( f/2.0) fiber coupled spectrograph (Patent No. 6,028,67); a very low noise Andor CCD camera TE cooled to < -80°C; and PROspectTM data acquisition and analysis software. The PROspectTMsoftware can be combined with GRAMS/AI9.1* for realtime chemometrics and process control applications. This Raman instrument design offers very high signal levels while retaining high resolution (~ 4 to 5 cm-1 depending upon excitation wavelength). Patented optical design allows full (3.3 mm) height coverage of the 1024 x 128 pixel CCD chip and wide fiber array input (17 X 100 micron diameter fibers) while retaining a straight fiber array image and good resolution. The system includes a fiber coupled probe with laser band pass and elastic light rejection (~10-8) filtering. With the 1200 grooves/mm grating, the spectral coverage is ~ 2100 cm-1 at 785 nm excitation. The grating is adjustable to allow use with excitation from 670 to 860 nm. The spectra can be exported in SPC or ASCII formats.

* GRAMS/AI8.0 is a registered trademark of Thermo Electron Corporation.

To download a printable version of the Spec sheet click here

Excitation Source

  • 785 nm Frequency Stabilized, Narrow Linewidth Laser.
  • Laser power (adjustable):  450 mW standard.
  • Higher power levels available – up to 1,500mW
  • Line width ~ 1.0cm-1.
  • Wavelength accuracy ± 0.1nm.
  • Wavelength repeatability (on/off) -< 0.15 cm-1 .
  • Wavelength stability -< 0.3 cm-1drift per week.
  • Laser lifetime -1 year warrenty (6 year projected lifetime).
  • Patented design – Pat. No. 6,100,975.

Raman Fiber Optic Probe

  • Inphotonics Raman Probe standard (other probes types available).
  • 200µm diameter excitation fiber, 400µm collection fiber.
  • Focal length – 5mm standard, 3 meter fiber optic cable.
  • Rayleigh filtering built into probe tip (>8 O.D.).
  • System can accommodate most any Raman probe configuration.
  • Probes manufactured from 316-SS, carbon steel, alloy-20, hastelloy, etc.
  • Ball probes also available.
  • Lowest Raman shift that can be measured ~225 cm-1.
  • ATEX Zone 0 certified.

CCD Detector

  • Andor DU401-FI (standard) Higher performance CCD detectors available.
  • TE cooling to < -60° – 82° C for low noise applications.
  • Pixel size = 26 µm square and full range area of 128 x 1024 pixels.
  • Other CCD configurations available; e.g., 256 x 1024 pixels..


  • Spectograph aperture: f/2.0.
  • Focal length: 135 mm.
  • Patented design: No. 6,028,667.
  • Diffraction grating: 1200 grooves/mm, ruled standard (other gratings available upon request).
  • Resolution: 4 cm-1with 785 nm excitation.
  • Spectral coverage: with 785 nm excitation ~2100 cm-1, with 830 nm excitation the spectral coverage is ~1900 cm-1 .
  • Fiber optic coupling: bundle to slit adapter with 100 µm fibers (17 fibers) in a linear input array (3.3 mm high) for coupling to spectrograph.
  • Temperature controlled: ~30° C for added stability.
  • Image curvature at exit plane: < 0.5 pixel over full height of CCD array.
  • User adjustable center wavelength via rotating grating.
  • Builtin neon lamp for wavelength calibration.


  • Online 19″ rack mount dimensions (80″ x 23″ x 40″), weight ~ 430 lbs.
  • Online Purged enclosure rack mount (72″ tall x ~ 28″ wide x ~ 36″ deep)


  • Up to 18 channels with fiber switcher (17” x 17” X 10”), weight 55 lbs.
  • Insertion loss is less then 1 dB.
  • Switching time between channels is ~ 0.5 s.
  • Patented design:  No. 6,859,581B1.

Online Instrument

  • Includes backup laser with an AUTO SWAP feature to automatically switch in the backup laser should the primary laser fail.
  • Includes a backup computer with hot swappable ARAID drives that can be quickly used if the primary computer should fail.
  • Lasers can be easily switched out with no user optical alignment.
  • Software features include automatic X- and Y-axis calibration, real time chemometrics, and continuous laser tracking to ensure stable operation.
  • Backup features along with auto calibration ensure that there is minimal downtime (typically < 2 hours/year/channel).
  • Includes modeling for 1st year of use, model training at our facility.
  • Remote monitoring of system health available.

System Software

  • Data collection with real time chemometrics, laser frequency tracking, multipoint neon lamp absolute wavelength calibration, and throughput normalization features for chemometric model transfer capability.
  • Auto calibration features available
  • Interface with a DCS system, RS485, RS232, or TCP/IP .
  • Data files can be exported into ASCII and SPC formats.

System Stability

  • Amplitude stability ± 0.2 % over 24 hours after 30 minutes warmup.
  • Frequency stability ± 0.1 cm-1 over 24 hours after 30 minutes warmup.

Power Requirements

  • 115 to 230 VAC, 47 to 63 Hz, 10A

System Warranty

  • Two year on both laser and instrument.