This enables the IR sensor which is located coaxially to the warhead.

They're moving around too much for us to get a hard count, even with the Hydra's IR sensors, but there are lots of them.

Engine emissions are another area where IR sensors are being researched for use.

Two conditional steps can pause the playback until either the light level changes, or an object passes in front of the IR sensor.

They had IR sensors, of course, and night-vision goggles.

What was the point of even trying the IR sensor in fog as dense as this?

Your IR sensors will pick him up; the computer will identify him, track him, show you his position at all times.

The fireball temporarily blinds my visual and IR sensors.

The IR sensors and other equipment either didn't pick them up or the guards watching it weren't paying very close attention.

Wearing heat dissipation armor, she'd shine like a beacon to IR sensors.