Graham,

I looked into this earlier this year.  There are thickness gauges that
measure non-ferrous coatings using eddy-current.  Some have detachable
probes while others have probes integral to the instrument.  The latter is
less expensive and would probably work well if you are measuring coupons.
The ones with detachable probes usually are available in varying probe
sizes.   Depending on what you need, these tools can be quite sophisticated
and also very pricey.  I have contact information on a couple of different
tools,  If you're interested, let me know off line.

-Sue

      ----Original Message----

      Date:    Tue, 16 Sep 2003 15:02:07 -0400
      From:    Collins Graham <[log in to unmask]>
      Subject: measuring the thickness of cured conformal coating

      Hello TechNet!
      I've got a question for the conformal coaters out there.

      Our situation:  We currently measure CCA thickness before
      application, and then again after application & cure of conformal
      coating, to determine how thick a coating we have applied.  We are
      currently using a micrometer to measure the thickness.  Our coating
      thickness is in the 0.001" to 0.005" range.

      My question is: what are others using to do this sort of measurement?
      Are there are better tools out there to do this faster / better?

      Thanks!

      regards,

      Graham Collins
      Process Engineer,
      Northrop Grumman Canada Corporation
      Halifax
      (902) 873-2000 ext 6215


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