Detectors

Smoke detectors should be fixed to the ceiling.

To activate the faucet, just wave your hands under the spout and the motion detectors will start the water flowing.

They're trained to beat lie detectors.

Those spies are trained to beat lie detectors.

Webb carries four state-of-the-art science instruments with highly sensitive infrared detectors of unprecedented resolution.

The motion detectors in the backyard went off.

The collider has massive detectors that fill cathedral-sized rooms at intervals along the ring. Some 6,000 super-conducting magnets guide the beams. Evans says 50,000 tons of equipment will have to be cooled down to temperatures that are colder than that of outer space.

Tom asked me what we needed metal detectors for.

Captain Phil Taneborne of the Royal Dragoon Guards and his unit spent Friday afternoon distributing metal detectors and checking to make sure everything is in place for the poll.