BIS C works with low frequency (LF) and uses two frequencies: 455 kHz for writing and 70 kHz for reading. Read/write heads are the link between the data carrier and the evaluation unit. These are available in a wide variety of designs and dimensions - e.g. as a round/rod antenna. BIS C is established as the standard for tool identification. It can be installed flush, even directly on metal. Product group=LF (70/455 kHz), dimensions=80 x 40 x 80 mm, installation=metal-free (free zone) on metal flush in metal, antenna shape=round, connection=M12x1 connector, housing material=PBT, storage temperature=-20...85 °C, ambient temperature=0...70 °C, protection class=IP67, approval/conformity=CEcULusWEEE