BioProTT
TM
Flow Measurement System Version 1.00 page 34 of 75
coupling, acoustic focuses) to the active sensor areas. A couplant ensures an easy slip of
the tube in the channel and provides repeatable alignment of the tubing wall.
To ensure an optimal measurement em-tec will provide support about the usage of
couplant for your specific tubing- sensor system.
Note: It will be shown in the calibration table and, if requested, in the calibration certificate
if a sensor was calibrated with or without couplant. Please make sure that your
measurements are performed accordingly. Otherwise over amplification or to low coupling
might occur.
If a deterioration in the coupling is evident e.g. during long-term measurements, this is
normally a sign that the couplant is drying out. To prevent failure of the measurement,
refresh the couplant on time.
Commercially available water based ultrasonic couplants can quickly dry out and lead to
poorer acoustic coupling. If other long time couplants e.g. vaseline are used, please ensure
compatibility with tubing and sensor material.
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