Lawrence's visual sensors showed him a man running through the crowd- something (long, dark) in his hand.

Or so he thought, until he realized that his visual sensors were just now coming back online.

She moved quickly out of range of the visual sensor.

If that means that you can still be recognized by visual sensors, what good is it?

Now he had a chance to follow the car even after it left the range of his aural and visual sensors.

No visual sensors I've been able to find, no audio either.

It has visual sensors at the end of each ray that can detect light and note prey.

Fortral looked up at something beyond the range of the visual sensor, as if checking a reading.

I believe there might be a visual sensor in that area.

She glanced away from the visual sensor transmitting her image, appeared to read something of interest.