LEAK DETECTION SYSTEM AND METHOD

A leak detection system (12) is provided with a first window (142) configured to mount at a first opening in a first wall portion (144) in an enclosure (14) (e.g., for a gas turbine engine (16) or other equipment in a power plant). The leak detection system (12) includes a leak sensor (20) configured to transmit a beam through the first window (142) and an interior of the enclosure (14) to obtain sensor feedback. The leak detection system (12) includes a controller (18) configured to evaluate the sensor feedback to monitor for a leak of a hazardous fluid in the enclosure (14).