Smoke camera, 0.1Lux, 3.6mm lens, with a smoke-detector shape, for ceiling use.
Smoke camera NLD-9224: 1/3" color Sony Super HAD CCD, 540TVL; Smoke camera NLD-9228: 1/3" color Sony Super HAD CCD, 480TVL; Smoke camera NLD-9222: 1/3" color Sony Super HAD CCD, 420TVL; Smoke camera NLD-9220: 1/4"color Sharp CCD, 420TVL.