This video was taken with SMI BATCAM 2.0 to detect gas leak at a thermal power plant. ·BATCAM 2.0 is the world’s lightest and smallest ultrasonic / sound camera. It can be used for various objectives, because it can measure not only signal in audible range but also in ultrasonic range. It has 112 microphones for high measurement sensitivity and can detect ultrasonic signal at 48kHz. BATCAM 2.0 can clearly measure not only car BSR(Buzz, Squeak, Rattle), but also the minute air · gas leak, and the electric arc.