THE MINI-WHEEL ENCODER IS USED FOR THE POSITIONING AND DIMENSIONING OF DEFECTS IN THE SCAN AXIS; IT CAN SYNCHRONIZE DATA ACQUISITION WITH PROBE MOVEMENT; THE ENCODER IS WATERPROOF AND BUILT WITH AN ALUMINIUM CASING A STAINLESS STEEL WHEEL AND HAS A RESOLUTION OF 12 COUNTS PER MILIMETERS (304.8 COUNTS PER INCH); DOUBLE O-RING TIRE FOR BETTER ADHERENCE; METALLIC STRAIN RELIEF FOR CABLE PROTECTION; SPRING-LOADED PIN FOR ENCODER ATTACHMENT; CABLE LENGTH:2.5 METER; CONNECTOR:DE-15