What type of sensor do utility companies use to inspect power lines for overheating?

Utility companies utilize thermal imagers to inspect power lines for overheating because these sensors can detect infrared radiation, which is emitted by objects based on their temperature. When power lines operate, they can generate heat due to electrical resistance. Overheating can pose a risk of equipment failure or even fires, so identifying hot spots is crucial for preventive maintenance.

Thermal imagers provide a visual representation of temperature variations, allowing technicians to identify problems quickly by highlighting areas that exceed normal operating temperatures. This method is non-intrusive and can be performed remotely, making it efficient and safe.

In contrast, optical sensors primarily measure light rather than temperature, ultrasonic sensors are used for detecting pressure changes through sound waves, and pressure sensors measure the force exerted by liquids or gases, none of which are specifically designed to identify thermal issues in power lines.