New Vista Corporation has developed a thread verification unit for use in automatic tool changing machining centers. The TVU-IR resides in a CNC's toolchanger and is automatically deployed like any other tool. The TVU-IR automatically checks for the presence, size and depth of internal or external threads. Following inspection, the battery-powered unit sends a "pass" or "fail" infrared signal to a standard receiving unit.

The TVU-IR is capable of GO gaging, NO GO gaging and combination gaging. Three sizes will inspect threads from 3 mm to 50 mm. Cycle times start at 0.7 seconds.