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 fiber bundle, consisting of 6 fibers and carried to the probe end, where it crosses a gap of 1, 2.5 or 5 mm and reflects against a diffuse white material. Back reflected light returns into a 7th fiber. This fiber transfers the data to the output SMA905 connector, which can be coupled to a spectrometer.
At the probe end the read fiber is placed in the middle of the lighting fibers 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 separated for one meter to reach the SMA905 connectors.
Technical Data
Fibers
6 illumination fibers, 1 detection fiber, all 200 µm, standard 2 meters
Wavelength range
200-800 nm (UV/VIS) or 350-2000 (VIS/NIR)
Connectors
SMA905 connectors (2x)
Tips
Replacement tips are available with 1, 2.5 and 5mm spacing, i.e. an optical path of 2,5 and 10 mm and contain a 5 mm diam. x 1 mm thick fused silica window
Probe end
Stainless steel 316 cylinder, 100 mm long x 8,0 mm diameter. Waterproof. Optionally -HY for Hastelloy® C276
Tubing
The optical fibers are protected by a silicon inner tube and a flexible chrome plated brass outer tubing. The tubing also gives stress relief. OD: 5,0 mm
Temperature
-30ºC to 100ºC. (-HT version 200°C)
Pressure
Probe head 10 bar @ 25°C
Bending
Minimum bend radius: Short term (few seconds) 20 mm, long term: 120 mm
Ordering Information
FDP-7xx200-2-yy
Transmission Dip Probe, yy(1, 2.5, 5 mm) gap, 2 m length, SMA term.
FDP-TIP-yy
Replacement tips, 1 mm, 2.5 mm, 5 mm gap for probe
(fill in gap lentgh for yy, note optical path =2*yy)
Options
-HT
High Temperature version (up to 200°C)
-HY
Hastelloy® C276 Probe material replaces Stainless Steel
Products