The Nu-Calgon 4184-08 Fluorescent Gas Leak Detector is a handheld device that is used to detect the presence of gas leaks. The device is equipped with a fluorescent light that is used to illuminate the area around the leak. The device is also equipped with a sensor that is used to detect the presence of gas. The device is able to detect the presence of gas leaks that are up to 8 feet in diameter. The Nu-Calgon 4184-08 Fluorescent Gas Leak Detector is a handheld device that is used to detect the presence of gas leaks. The device is equipped with a fluorescent light that is used to illuminate the area around the leak. The device is also equipped with a sensor that is used to detect the presence of gas. The device is able to detect the presence of gas leaks that are up to 8 feet in diameter.