Product Overview - Raman Fiber Optic Probes

The VERAX&trade system is offered in collaboration with InPhotonics Inc., the originator of the RamanProbe&trade optical probehead offering efficient signal collection and complete attenuation of the line line. The coaxial, two-fiber design (U.S. Patent 5,122,127) uses micro-optics for precise beam steering, optical filtering, and signal collection. Unlike other "filtered" probes which only reduce the laser intensity by a factor of 103 - 105, RamanProbes&trade all provide 108 filtering that reduces the laser signal far below the intensity of typical Raman bands. This results in clean spectra without the Rayleigh "tailing" into the low-frequency region, and avoids saturation of the detector on an unwanted laser line. RamanProbes&tradeare available in a complete product line for research, analytical and industrial applications.


Product Comparison

 

RamanProbe

RamanProbe II

Reaction RamanProbe

Process RamanProbe

 
General description The original patented probe: focussed, non-immersible, compact size. Focussed probe with liquid-tight immersion sleeve. Probe can be removed from sleeve for non-immersion use. Industrial probe with pressure-resistant sleeve for process monitoring applications. Industrial probe with safety-shutter and temperature/pressure-resistant extension tube. Probe optics can be used with multiple extension tubes, or for routine applications with lens insert.  
Outer diameter 0.5" (13 mm) 5/8" (16 mm) with immersion sleeve 5/8" (16 mm) with immersion sleeve 3/8" (9.5 mm) extension tube  
Overall probe length 4" (101 mm) 8" (203 mm) approx. 15" (380 mm) standard, optional up to 24" approx. 17" (430 mm)  
Immersion length N/A (not immersible) 6" 12.5" (318 mm) standard approx. 9" (230 mm)  
Construction, window material(s) and sealing method Stainless-steel body, no window Stainless-steel probe body and immersion sleeve with quartz window with PTFE o-ring 316 Stainless-steel probe body and immersion sleeve with AR-coated sapphire window (welded seal with o-ring). 316 Stainless-steel with sapphire window (gold seal, compression weld). Flat window with lens or integrated window/lens available.  
Working distance Factory set, select between 5, 7.5, 10, or 12.5 mm User-adjustable between 4 and 1 mm User-adjustable between 4 and 0 mm Factory set, select from 4 and <1 mm  

Excitation fiber (from laser source) and collection fiber (to spectrograph), cable type and length

 

90 µm, low-OH fiber (excitation) and 200 µm, low-OH fiber (collection), polymer-encased, 5 m length (std.), > 200 m as option

OR

200 µm, low-OH fiber (excitation) and 400 µm, low-OH fiber (collection), steel-encased, 3 m length (std.), 50 m as option

OR

50 µm, low-OH fiber (excitation) and 100 µm, low-OH fiber (collection), steel-encased, 3 m length (std.), 50 m as option
100µm, low-OH fiber (excitation) and 200 µm, low-OH fiber (collection), steel-encased, 5 m length (std.), 50 m as option (extension cable available if longer length required)

OR

200 µm, low-OH fiber (excitation) and 400 µm, low-OH fiber (collection), steel-encased, 3 m length (std.), 50 m as option

OR

50 µm, low-OH fiber (excitation) and 100 µm, low-OH fiber (collection), steel-encased, 3 m length (std.), 50 m as option
100µm, low-OH fiber (excitation) and 200 µm, low-OH fiber (collection), steel-encased, 5 m length (std.), 50 m as option (extension cable available if longer length required)

OR

200 µm, low-OH fiber (excitation) and 400 µm, low-OH fiber (collection), steel-encased, 3 m length (std.), 50 m as option

OR

50 µm, low-OH fiber (excitation) and 100 µm, low-OH fiber (collection), steel-encased, 3 m length (std.), 50 m as option
100 µm, low-OH fiber (excitation) and 200 µm, low-OH fiber (collection), steel-encased, 5 m (std.), 50 m as option (extension cable available if longer length required)

OR

50 µm, low-OH fiber (excitation) and 100 µm, low-OH fiber (collection), steel-encased, 5 m length (std.), 50 m as option (extension cable available if longer length required)
 
Fiber optic connectors Choice of FC or SMA connectors on both fibers Choice of FC or SMA connectors on both fibers Choice of FC or SMA connectors on both fibers Choice of FC or SMA connectors on both fibers  
Maximum temperature 80oC 200oC 200oC 500oC (external optics must be maintained below 200oC  
Maximum pressure N/A (not sealed) Standard immersion sleeve is sealed but not designed for high pressure use

High pressure immersion sleeve with brazed sapphire window available as option
1600 psi 3000 psi  
Compatible with accessories for routine sampling Yes Yes, with immersion sleeve removed Yes, with immersion sleeve removed No, but lens insert provided for routine probe use  
Excitation wavelength 514, 532, 632, 670, 785, or 830 nm 514, 532, 632, 670, 785, or 830 nm 514, 532, 632, 670, 785, or 830 nm 514, 532, 632, 670, 785, or 830 nm  
Other options Side-viewing, longer probe length, high temperature versions Other immersion sleeve materials available Quartz window (recommended for 633 and 670 nm excitation).

Hastelloy C sleeve construction with compression-welded gold seal.
Extruder probe tip with Dynisco® fitting.

High-pressure seal with diamond window available for vapor-phase monitoring.

Purgeable housing to seal external optics and enable cooling for very high temperature monitoring.

AR-coating on window (for use below 200
oC)
 


Sor More Information, visit the
InPhotonics Inc. Website