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Probe meets specific coating thickness need in automotive manufacturing process
A great deal of effort goes into reducing vehicle weight by using lighter components; e.g. the use of Sprayable Acoustic Material (SAM) coatings in vehicle interiors. These locally applied insulation layers replace the larger and heavier soundproofing mats previously used. In order to meet the targets for sound protection, weight, clearance and cost, the thickness of these coatings must be carefully monitored. SAM insulation has the further advantage in that it can be applied precisely and selectively by robots, allowing a full automatic manufacturing process. Typically, these SAM coatings are between 2 and 4.5 mm thick, very often located in places that are difficult to reach, and found on top of either aluminium or steel – that is, on both ferrous and non-ferrous substrates. Fischer have developed the eddy current method FA14 probe, which is effective for measuring non-conductive coatings of up to 5 mm thickness on conductive base materials. The probe of FA 14 can be connected to the handheld instruments of the FMP-family, either DUALSCOPE® or ISOSCOPE® models. For the full application note, please click on the Documents tab.

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