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The Mk II
Holographic Filtered Probe Head (HFPH) uses holographic
optics to provide high signal-to-background measurements at any
length of optical fiber. The field-proven fixed-optic design provides
long term measurement stability along with superior background rejection
and maximum sampling flexibility.
The RMS-threaded faceplate of the Mk II probe head
allows a wide range of optics to be attached. Non-contact optics
with working distances of 0.1 to 17 inches can be used to measure
through windows, bottles, or simply at a convenient distance from
a sample. Immersion and insertion optics are available that use
single, double, or triple window designs to allow safe, direct installation
into reaction vessels or process streams. The Mk II probe head
also serves as a stable interface for the Raman Microprobe and CDRH
class I sample compartment (HLSC) options.
All Mk II probe heads use a single fiber for excitation
and another for collection. For laboratory equipment, this provides
a robust interface and sampling versatility. For process equipment,
single fibers allow reduced cost for long runs of fiber as compared
to multi-fiber collection designs. Single collection fibers also
permit multi-channel operation on a single spectrograph. Standard
telecommunication fiber diameters (< 100 microns) are used to
increase mechanical stability. This results in fewer broken fibers,
increased safety, and lower maintenance costs.
The Mk II probe head features an integrated “Laser
On” indicator and laser shutter and requires no electrical
power.
The Mk II above is shown with a non-contact optic.
The shutter and laser indicator are plainly visible on the face
of the probehead. The inset shows the probehead without the optic.
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Features
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180° measurement
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Patented holographic filter design
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One in/one out fiber optics
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Integrated “laser on” indicator
and laser shutter
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RMS-threaded faceplate to fit a range of sampling
optics
- FC connectors
Cable Features
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Indoor/outdoor-rated cable design
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-40 to 85 °C operating temperature standard
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UL-listed riser rated OFNR
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Integrated precision-tensioned strength members
Optic Options
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Non-contact optics 0.3-17 inches
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Immersion optics up to 450 °C
and 3000 psi
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Extruder-compatible optics
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Flanged process-compatible optics
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