The motion sensor developed for those products is still in use.

Since they can't seem to see us on the motion sensors, we have to go all the way back ourselves.

Many of the lights within the school include motion sensors as well.

Looks like it's got a motion sensor on it, too.

The motion sensors were green boxes set about four feet off the ground.

Hopefully there were people close at hand and some sort of motion sensors.

The only way we can find anything out there is with the motion sensors.

"I think we can navigate by the numbers on the motion sensors."

Most motion sensors are designed with only a certain amount of sensitivity in mind.

"We have motion sensors all around the park," Arnold said.