Metal sampling tube duct widths 2 ft to 4 ft (0.6 to 1.2 m)
Metal sampling tube duct widths 4 ft to 8 ft (1.2 to 2.4 m)
Sampling Tube for SM-501 Series
Designed for use with the SM-501, SL-2000, RT-3000 or HS-100 Series duct smoke detectors
20 to 29VDC
Single sensor 4-wire photoelectric low-flow smoke detector.
Provides early detection of smoke and products of combustion present in air moving through HVAC ducts