Ms. Neill said the sensors, positioned on the billboard poles, could capture the signals of 60 to 85 percent of the passing cars.

Passive sensors can capture information for which there is no way to generate man-made radiation, such as gravity.

The satellite's infrared sensors and television cameras captured the event from 111 miles away.

The sensor would capture and record the characteristics of the gamma ray.

The improved sensor and lens definitely capture more detail than previous iPhones.

An optical sensor in the pen captures the pattern of the pen strokes by taking 50 snapshots a second.

The sensors captured the participants' physiological reactions during the concert, including muscle tension, galvanic skin response, heart rate and body temperature.

When used in 6 megapixel mode, the secondary, highlight sensor is disabled and only the larger sensor captures an image.

This produces predictable distortions of fast-moving objects or when the sensor captures rapid flashes of light.

(Another sensor on Terra captured a wider view on August 17, 2011.)