It does this by using infrared sensors on the satellite.

Students then use the response pad to send their answer to the infrared sensor.

In close, with smart skin and infrared sensors, the F-22 has the edge.

These movements would be read by infrared sensors and transferred as movement in the game.

He stopped, listened, then realized what it was: someone had turned the infrared sensors back on.

Make a landing but first turn on the infrared sensors.

It also has an infrared sensor at the top.

Lead telluride is used in another type of infrared sensor.

The control system includes two infrared sensors that can be clipped to the track.

The common vampire bat may also have an infrared sensor on its nose.