VLF stands for Incredibly Reduced Frequency and is identical know-how used in detectors designed for coins, jewellery, and relics. VLF detectors broadcast at frequencies measured in kilohertz starting from three kHz to 70 kHz. Listed below are five reasons why you may perhaps opt for a VLF around a PI http://lkf.phorum.pl/viewtopic.php?p=53152#53152