EMG SOLID® LIF – Laser-induced fluorescence spectroscopy
The measuring principle
Via laser-induced fluorescence spectroscopy the system measures the coating weight of the oil layer and visualises it over the entire measured material surface:
- Special solid state laser delivers 10.000 single pulses per second.
- Robust and flexible quartz fibre bundle transmits the light energy to the measuring spot.
- A second quartz fibre bundle transmits the fluorescence signal to the counting system, in which a photo multiplier detects single photons in a time-resolved manner and analyses them in nano seconds statistically.
- A micro controller controls the analysing system, manages the system calibrations and calculates the results.
- low influence of roughness, textures, oil droplets, hotmelt structures, therefore no homogenisation rolls necessary
- proof of very thin layers < 20 mg/m² in principle possible, therefore usable for cleanliness measurements
- only very small space required
- absolute and relative measurements possible
- special EMG solution for keeping the lens clean
- high measuring accuracy
- very high measuring frequency (10 kHz) and high definition of measuring spot (Ø = 8 mm)