Flexible automation systems provides digital mark sensors [lx100 series].These digital mark sensors can detect both marks and colours of objects using a single sensor and control unit designed and developed by snux of japan. The nomenclature for this type of sensors is the lx-100 series. Some of the salient features of the sensor head include three types of leos [rgb] emitting elements all in one; high precision co-axial reflective optical system; 4-digit digital display; easily accessible operation buttons on the front panel; high resolution achieved by using 12-bit aid converter; and two selectable sensing modes with sensing range of 10 mm with ip67 protection.