Abstract: An apparatus for continuously gauging containers has a feed screw to positively move the containers to be gauged along a straight line beneath an endless chain upon which are mounted a plurality of gauging devices. The endless chain has a lower reach spaced above the containers and an upper reach vertically spaced above the lower reach. Each gauging device has an axially movable "go-no go" gauge therein, and there is a horizontally movable reject pin on the gauge. The pin is moved horizontally to a reject position when the gauge indicates "no go" and the pin is then returned to its normal position before the gauges are moved to the beginning of the first or lower reach. At the end of the lower reach, each gauge is retracted and then extended as each gauge is moved into the beginning of the lower reach.