Transmission Immersion Probe
The transmission dip probe is used to obtain online and in-line absorbance measurements in fluids.
By dipping or permanently mounting the probe end into the fluid stream, the absorbance is measured. Via a standard SMA905 connector light is coupled into a fibre bundle consisting of 6 fibres and carried to the probe end, where it crosses a gap of 1, 2.5 or 5mm and reflects against a diffuse white material. Back reflected light returns into a 7th fibre. This fibre transfers the data to the output SMA905 connector which can be coupled to a spectrometer or spectral analyser.
At the probe end, the read fibre is placed in the middle of the lighting fibres for best efficiency of the probe. Both bundles are led through one piece of flexible stainless steel tubing. In a ferrule, they are split and run separately for 1 meter to reach the SMA905 connectors.
Technical Details
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Fibres |
6x illumination fibres, 1 detection fibre, all 200µm, 2m length |
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Wavelength range |
200-800nm (UV/VIS) or 350-2000nm (VIS/NIR) |
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Connectors |
2x SMA905 |
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Tips |
Replacement tips are available with 1, 2.5 and 5mm spacing giving a pathlength of 2, 5 or 10mm and contain a 5x1mm thick fused silica window |
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Probe end |
Stainless Steel cylinder, 100mm long x 8.0mm diameter. Waterproof. |
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Tubing |
The optical fibres are protected by a silicon inner tube and a flexible chrome plated brass outer tubing. This tubing also provides stress relief. OD 5mm. |
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Temperature |
-30°C - 100°C. (High temperature available on request) |
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Bending |
Minimum bend radius: Short term (few seconds) 20mm, long term: 60mm |
Technical Drawing
Ordering Information
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FDP-7xx200-2-yy |
Transmission Dip Probe, yy = specify 1, 2.5 or 5mm tip gap, 2m length |
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FDP-TIP-yy |
Replacement tips, specify yy = 1, 2.5 or 5mm gap (pathlength = 2x physical gap) |
