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Air Products and Controls SM-501-N

Duct Mounted Ionization Smoke Detector

SKU : SM-501-N
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About this Item

SM-501 Series - Duct Mounted Ionization Smoke Detector - Ionization, 4-Wire, Universal Voltage
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Product Highlights

Air Products and Controls SM-501-N - Duct Mounted Ionization Smoke Detector

IMPORTANT: This model requires a specially notched sampling tube, which must be purchased separately to complete the installation. Select from models STS-2.5, STS-5.0 or FAST-TUBE.

The SM-501 Series Duct Smoke Detector provides early detection of smoke and products of combustion present in air moving through HVAC ducts in Commercial, Industrial, and Residential applications. The unit is designed to prevent the re-circulation or spread of smoke by air handling systems, fans, and blowers. Complete systems may be shut down in the event of smoke detection. The SM-501 model will operate on any one of four input voltages (230V, 115V, 24V, or 24VDC). The SM-501 allows up to 30 detectors to be interconnected for many common functions.


  • Operating voltages: 230V, 115V, 24V, 24VDC
  • Both models listed for high temperature applications
  • Interconnect up to 30 units for common functions
  • UL, CUL, CSFM, and MEA Listed
  • Compact Size Two sets of 10A form "C" alarm contacts
  • One set of 10A form "C" trouble contacts
  • Rugged steel back box with clear cover
  • Compatible with the WP-1 weatherproof enclosure
  • Easy retro-fit/upgrade of existing RW Series detectors
  • Clear cover fitted with 4 captive screws
  • Large terminal connection screws
  • Interchangeable "Plug-In" photoelectric or ionization heads
  • Easy mounting without cover removal
  • Advanced detector head design yields internal dust filtering with no additional screens or filters to clean
  • Over 15 remote accessories available

Manuals & Docs

Air Products and Controls SM-501-N - Duct Mounted Ionization Smoke Detector
Weight 3.4 Pound (lb.)
Height 9.25 Inches (In)
Width 3.13 Inches (In)
Length 7.38 Inches (In)
Brand Air Products and Controls
Model Family SM-501 Series
Voltage 24 VAC or 24 VDC or 115 VAC or 230 VAC
Amps .035
Power Source 230VAC, 115VAC, 24V
Cycle/Hertz 60
Batteries Included No
Display No
Battery Backup No
Color Gray
Connection Type Solid or stranded wire
Operating Temperature Range 32°F to 158°F (0°C to 70°C)
Type Ionization
Warranty Offered 3 Year
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