Determination
of hematocrit values
(hematocrit =
densitiy of human blood) dissaertation, Australia |
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laser sensor |
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The
traditional method to determin the hematocrit is labour intensive and
involves expensive laboratory equipment.
The M5 distance sensor introduces a faster and more effective way to
measure the hematocrit by analizing the reflection of the intensity signal.
For the interpretation of the value, only a digital voltmeter is necessary.
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Foto: measuring
device in the laboratory
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The
laser beam is conducted from transparent bottom into the cuvette. The
value of the intensity signal alters with the change of blood density.
A direct correlation between the intensity signal and the blood density
could be proved.
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Technical
background
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The laser light is largely scattered by the red blood
cells. A large portion of the light will be absorbed by the cells and
with increased densitiy a reduction in light reflection can be noticed.
At the same time, the transparency of the blood serum causes an irregular
penetration of the laser light; therefore the distance signals are not
evaluable, but the intensity signal is readable.
A reprocuction of this trial with other liquids surprisingly showed,
that with the manner of intensity signal many measuring problems can
be solved.
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The M5 sensor is the predecessor
of the now available M7 distance sensor. With
an increased sampling frequency of 54 kHz measurings of fast moving objects can be made.
For over 20 years MEL is the most innovative producer of intelligent sensors.
Take advantage of our experience.
We are delivering turnkey solutions, or soft- and hardware for integration
into user specific projects.
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