Hi Bob, We use XRF for most plating thickness analysis (PCB and other plated parts). We cross-section and verify either optically or with SEM/EDS when we can. Most of the time, we're within about 5%. We use several Fischer Technologies systems. http://www.fischer-technology.com We've had positive experience with these tools in the NJ lab and have since implemented this tool as part of our global IQC. -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Wettermann Sent: Tuesday, October 18, 2016 8:29 AM To: [log in to unmask] Subject: [TN] Measuring Gold Thickness Outside of x-sectional measurements for QA. can someone please share their favorite method/instrument for measuring gold thicknesses on PCBs? Thanks Bob/BEST