What is one piece of modern equipment that uses infrared technology to enable fire fighters to find objects giving off a heat signature?

Thermal imaging devices are essential tools used by firefighters to detect heat signatures emitted by individuals, vehicles, and other objects in various conditions, especially during low visibility scenarios such as smoke or darkness. These devices work by capturing infrared radiation, which is emitted by all objects based on their temperature. Firefighters can thus identify hotspots, locate trapped persons, and assess fire conditions from a safe distance. This capability is crucial for effective search and rescue operations and for determining the intensity of a fire, ultimately enhancing safety and efficiency on the scene.

The other equipment mentioned does not utilize infrared technology for identifying heat signatures. A PASS (Personal Alert Safety System) device is used for alerting others when a firefighter becomes motionless, a Nomex hood provides thermal protection to the firefighter's head and neck, and a GPS scanner is used for location tracking and navigation rather than detecting heat.