© PCE Teknik Cihazlar
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Effects of oxide layers on surfaces
Some metals can form a dense oxide layer on the surface, for example aluminium. This oxide
layer is firmly bonded to the substrate without an obvious boundary layer. However, the
transmission speed of ultrasonic waves is different in these two substances, which causes errors.
Different oxide layers cause different errors that the user should be aware of. You can use a piece
of the same material the thickness of which you have checked with a gauge to calibrate the meter.
Use and selection of the coupling agent
Coupling agent is used to transmit high frequency ultrasonic waves between the probe and the
material being tested. The wrong coupling gel or improper use can lead to errors or failed
measurements. It should be used in appropriate amounts and applied evenly.
The coupling agent is usually applied to the surface of the material under test. If the temperature
is too high, the coupling agent is applied to the bottom of the probe.
Only PCE Instruments coupling gel should be used.
10 Warranty
You can read our warranty terms in our General Business Terms which you can find here:
https://www.pce-instruments.com/english/terms
11 Disposal
For the disposal of batteries in the EU, the 2006/66/EC directive of the European Parliament
applies. Due to the contained pollutants, batteries must not be disposed of as household waste.
They must be given to collection points designed for that purpose.
In order to comply with the EU directive 2012/19/EU we take our devices back. We either re-use
them or give them to a recycling company which disposes of the devices in line with law.
For countries outside the EU, batteries and devices should be disposed of in accordance with
your local waste regulations.
If you have any questions, please contact PCE Instruments.
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