Immediately following electrical storms, our plant always shut down and had numerous board and card failures, along with having to reboot all the software programming. Since the installation of the SineTamer units, we have experienced a few major electrical storms, and have not experienced any problems which normally occurred after a lightning storm. No rebooting of the system, NO board or card replacements in the PLC cabinets, and NO lost time. This has saved us a tremendous amount of money on our annual maintenance budget, and the units are warrantied unconditionally for 15 yrs.