Other sensors tracked body heat through each room, while still others would trigger an alarm for any electronic explosives set.

As you walked away from me, sensors in the floor tracked your footsteps.

But sensors cannot track the camera once it physically moves.

These sensors track her every move on a central computer.

Then a sensor that is no larger than a pea tracks the movements of the fingertips.

Such sensors can track these low settings over time and recalibrate themselves based on the reference levels.

The sensors track the child's temperature throughout the night.

And besides, sensors can track a ridership capable of Jump.

The sensors read this difference and thus can track direction.

The board uses sensors to track a user's weight and movements.