Structure-Borne Sound Sensor BS20
2 Sensor description
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Revision: 1.0; Date: 2017-11-06
2.4 Accessories for the structure-borne sound & temperature sensor BS20
The intensity and behavior of ultrasonic signals depend on factors such as the process during
which they are generated. Options for verifying and recording the signals and for providing
these to the user in high-quality format so that useful statements can be made with regard to
system conditions are also dependent upon a number of different factors.
In order to record high-quality signals for processing in the structure-borne sound & temperature
sensor BS20, waveguides are available for different testing tasks.
In order to ensure optimal results, please observe the fields of application for the accessories as
well as the corresponding instructions.
Short waveguide BS20-1
Accessory for structure-borne sound and temperature
sensor BS20 (standard)
Fig. 1: Short waveguide BS20-1
The waveguide is used to record ultrasonic waves that spread in solid structures, and to pass
these on for processing in the sensor. Sufficient contact pressure is required in order for this to
work correctly.
Note: For comparable results, sound should always be recorded from the same position. It may
be useful to attach a punch point at the required position.
Long waveguide BS20-2
(optional)
Accessory for structure-borne sound and temperature
sensor BS20
Application:
Tests on hard-to-access points
Fig. 2: Long waveguide BS20-2
This waveguide, which is longer than the BS-20-1, makes it possible to reach test points that
are harder to access. The long waveguide also makes it possible to carry out tests on hot
surfaces.
The signals will be slightly modified as a result of the longer sound path, and this will need to be
taken into account in the evaluation.
