CastingScopes from Lenox Instrument Co. (www.lenoxinst.com), Trevose, Pa., inspect metal castings and other hard-to-access areas, such as the inner workings of cylinder heads and engine blocks. After thousands of inspections, worn renewable front probes can be easily replaced.

High-resolution color (480 line) CCTV cameras couple to the instruments. Images display on a color monitor. Probes are available in the following diameters of 0.138 in. (3.5 mm) and 0.236 in. (6 mm), and the minimum length is 7.9 in. (200 mm). Illumination is provided by fiber optics from a variety of light sources. The company says more than a million inspections are possible before factory service is needed.