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<p>[QUOTE=&quot;desertgem, post: 3409710, member: 15199&quot;]I do not think the dealer was using a XRF machine as they do not require touching and are usually out of the flip as a beam is used to stimulate the metal. Many dealers have ultrasonic testers which requires the probe contact on the coin surface ( I do not know if some models have an adjustment for type of flip/holder), but the ultrasonic may require adjustment for the thickness of the coin, etc. So like Doug, I don&#039;t know, but my suspicions are quite high that it was not a XRF machine.&nbsp; Here is a review of the Sigma&nbsp; and it mentions it doesn&#039;t have to be taken our of the flip.</p><p>Jim</p><p><a href="http://about.ag/SigmaMetalytics.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://about.ag/SigmaMetalytics.htm" rel="nofollow">http://about.ag/SigmaMetalytics.htm</a>[/QUOTE]</p><p><br /></p>

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