Internal sensors would tell whether they were following or not.

They'll also monitor us through the internal sensors at the same time.

He had to glance away from her forward internal sensors.

"Which would explain why he wasn't picked up on internal sensors."

Data stood at the internal sensors, his hands moving so quickly that they blurred.

"I have made some progress with the internal sensors," Data replied.

In fact the car wouldn't allow itself to be started unless its internal sensors told it there was plenty of water on board.

I've got a team working with the internal sensors, to see if there are more.

Internal sensors were knocked out first, and that was not a system open to failure before several others.

Such an action would be immediately detected by the ship's internal sensors.