Typical Physical Properties
Central
laser wavelength: 1550 nm
Typical
operating voltage: 8 (V) – DC
Max
Rev voltage: 2 V
Typical
Output Power 55 mW
Storage
Temp: -10 to 65 °C
Operating
Temp: 0 to 50 °C
Typical
Weight: 1 Kg
Typical
dimension: 200 mm x 150 mm x 80 mm (main box) + 95 mm x 87 mm (external card)
Fiber
optics cable: Single mode fiber - glass
Length
of Fiber optics cable: to be decided based on the application
Range
of measurement of refractive index: 1<n<2
Phase of sample: Liquid
Safety
Class 3R laser product
Class 3B laser product
Precise measurement of the liquid concentration is important due to its applications in bio-chemical analysis, environments and contamination assessment, diagnostics, food and chemical industry. So far, many different techniques offer the liquid concentration measurement, among them the current technique which is based on Fresnel reflection gained attentions for the advantages of having real-time measurement, easy to operation, cheap setup and remote monitoring.
Laser light at wavelength of 1550 nm passes through a single mode fiber optic cable. Changing the medium at the interface between the fiber optic tip and the liquid sample results in changing the refractive index, therefore the reflected light (feedback signal) has an angle proportional to the refractive index of the second medium. Here, in the case of single mode fiber, the incidence beam is normal to the interface plane so θ1= θ2=0. According to the Fresnel reflected, the intensity of input and output are following the equation: where Iout is the signal output, Iin original input light intensity, K the calibration coefficient, nf is the refractive index of fiber optics and nx the refractive index of liquid. Since refractive index is depending on concentration, easily we can calculate the percentage of components of binary solution.
- fundamental research
- concentration of binary fluidic mixtures for aerospace purpose
- effect of environmental parameters (i.e. temperature, humidity, pressure, etc.) on refractive index of liquid
- optimization of concentration measurements based on time consuming techniques
- food industry
-
measurement of Brix level of glucose in:
- tomato industry
- milk industry
- wine and beer industry
-
other industry
- paper mill
INWIP - Innovative Wickless Heat Pipe Systems for Ground and Space Applications - ESA MAP PROGRAM
TOPDESS - Two-phase passive thermal devices for deployable space systems / ESA SciSpacE Microgravity Application Promotion Programme