Pryor Marking Technology, a leader in the provision of marking, vision and software for traceability, launched a new low-cost, ultrasound code reader named Locus at EMO 2007. This hand-held reader is able to decode data matrix and human readable marks concealed by paint or other industrial coatings including oil and grease, to a depth in excess of 1mm.

Locus uses an advanced, patented ultrasound technology to automatically adapt its reading capabilities to compensate for the varying thickness of the covering layer of paint, dirt or other forms of contamination. Unlike conventional ultrasound technology, Locus is unique in that it does not require a fluid-coupling medium and operates using only dry coupling with the surface containing the hidden code.