17
BRAVO Analyzer - User Manual
2 General information
2.1 Fields of application
BRAVO is a handheld Raman spectrometer designed for raw material verification and
raw material identification. It is approved for indoor usage only, namely in laboratory and
warehouse environments. A typical field of application is the incoming goods inspection.
There are two different types of measuring tips which are interchangeable. These mea-
suring tips can be used for measuring liquid and solid samples being filled in a vial or in
a plastic bag, in a barrel, for example. With BRAVO, the samples are measured in a non-
contact way.
2.2 Technical feature
The BRAVO analyzer is characterized by the following technical features:
Duo Laser
TM
excitation
The BRAVO analyzer is equipped with two laser diodes which emit radiation in the wave-
length range between 700nm and 1100nm. This dual laser excitation provides for a very
high sensitivity across the entire spectral range. This in turn ensures a very high degree
of unambiguous sample identification.
Fluorescence mitigation by sequentially shifted excitation (SSE
TM
)
1
Normally, the Raman spectroscopic measurement technique is not suitable for samples
which tend to fluoresce when being exposed to laser radiation because sample fluores-
cence can yield a much more intense signal than the Raman scatter of the sample,
masking any Raman bands in the spectrum.
The patented SSE
TM
technique, however, allows for obtaining pure Raman spectra even
in the presence of intense fluorescence by exciting the sample with a sequentially
shifted laser radiation. Due to the implemented fluorescence mitigation technique
SSE
TM
, BRAVO can also be used for measuring samples which tend to fluoresce when
being exposed to laser radiation.
Inbuilt wavenumber calibration
The automated wavenumber calibration ensures highly reproducible measurement
results and an unmatched wavenumber accuracy. They are crucial for a raw material
identification in a validated environment.
Automatic recognition of the measuring tip
BRAVO recognizes automatically the currently installed type of measuring tip. In addi-
tion, this information is stored automatically in the measurement records.
1. US patent 8,570,507, other patents pending
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