Raman Slim Immersion Probe

Central to the design are filtering and focusing optics, maximizing optical throughput while completely attenuating the Rayleigh (laser) line. The probe uses only hard oxide filters that can withstand high temperature and humidity conditions. Single fiber collection provides a simple and cost-effective means to measure 100’s of meters away from the spectrograph.

The pressure-tight stainless-steel extension tube is equipped with a compression-welded sapphire window at the tip. A range of fixed working distances is available, as is a user-adjustable version. Other tube diameters are available upon request.

Process Raman Probe for reaction monitoring at elevated temperatures and pressures, for use at 785 nm excitation:

Stainless-steel probe body with custom Hastelloy electropolished bioreactor immersible extension sleeve, 12 mm diameter, ca. 9.75″ (248 mm) in immersible length

PG13.5 threaded fitting welded to extension sleeve, position TBD

Sapphire window sealed and welded to Hastelloy C-276 extension sleeve, providing focal point ca. 0.5 mm away from window face

Extension sleeve is specified up to 3000 psi (200 bar) and 450oC (842F). Probe body and cable must be maintained below 200oC

Patented micro-optics for beam steering and filtering of the laser line and fiber optic background features (OD 8 at the excitation wavelength)

Spectral range 200 – 5000 cm-1 Stokes**

5 meters of steel-encased fiber optic cable, 105?m excitation with FC/APC connector/ 600?m collection fiber with SMA905 connector

Manual shutter to block laser emission with built-in reference standard (patent pending)

Warning LED (cable includes electrical wires for warning LED)