Store Front Account Search Basket Contents Checkout
Sign In
Order History

Sensors & Transmitters
   Data Acquisition
   pH and ORP
   Relative Humidity / Dewpoint
   Differential Pressure
   Carbon Dioxide
   Nitrogen Dioxide
   Carbon Monoxide
   Smoke Detectors
   Current Sensors
   Proximity Sensors
   Photoelectric Sensors
   Safety Light Curtains
   Cables and Distribution Boxes
   Oxygen Transmitters


Tel: 1-925-706-7433

ACI/SM-501 and ACI/SM-2000 Smoke Detector

ACI/SM-501 and ACI/SL-2000 Smoke Detector

The ACI/SM-501 and ACI/SL-2000 series duct smoke detectors will provide early detection of smoke and products of combustion present in the air moving through a duct in any commercial, industrial, or residential application. These devices are designed for the prevention of smoke re-circulation by the air handling systems, fans, and blowers. Complete systems may be shut down in the event of smoke detection.

The ACI/SM-501 and ACI/SL-2000 will allow up to 30 detectors to be interconnected for some of the common functions including the use of a common test/reset function or to alarm when a single unit alarms. Up to 15 units and signaling devices may be interconnected to operate with a single alarm. The ACI/SM-501 and SL-2000 are designed and built to meet all local requirements, as well as the NFPA regulations regarding duct smoke detectors. Output terminals are provided for remote accessories such as horns, strobes, remote status indicators, and test/reset key switches or pushbuttons.

The Ionization and Photoelectric detector heads are interchangeable. Air sampling is accomplished via two tubes that protrude into the duct. An exhaust tube with a standard length of 7" is supplied in the installation kit with the unit. Once the duct size is determined, a sampling tube must be ordered. Three standard sizes including a 2.5', 5', and 10' lengths can be ordered and cut to the correct size of the duct.

The ACI/SM-501 and ACI/SL-2000 provides (2) sets of 10A Form "C" alarm contacts, along with (1) set of 10A form "C" trouble contacts for monitoring head removal and supply voltage failure. The green pilot and red alarm indicators provided on the front of the SM-501 signal the operating status of the device. The green pilot LED will be extinguished when the detector head is removed. A manual test/reset switch is located next to the LED indicators. All of these units come with a 2 year factory warranty.

Supply Current
Voltage Stand-by Alarm
  SM-501 SL-2000 SM-501 SL-2000
24VAC 35mA 39.3mA 74mA 59.3mA
24VDC 15mA 13.5mA 56mA 128.7mA
115VAC 25mA 13.8mA 32mA 27mA
230VAC 12mA 7.9mA 16mA 16mA
Air Velocity SM-501 500 to 4,000 ft./min SL-2000 100-4000 ft./min
Relay Outputs Alarm: (2) sets form "C" relay 10A @ 115 VAC resistive
Trouble: (1) form "C" relay 10A @ 115 VAC resistive
Enclosure SM501: 18 Ga. Steel backbox, clear plastic cover
SL2000: Grey plastic back box, clear plastic cover
Approvals SM-501 UL Listed, (UL268A; UROX. S2829) / CSFM Listed (3240-1004:108) / MEA Listed (73-92-EX); Vol. 20.
Approvals SL-2000 CSFM Listed (3240-1004:105) / MEA Listed (73-92-E); Vol. 27.
Ambient Temperature Range SM501-N & SL2000-N: 32 to 155°F (0 to 68°C)
SM501-P & SL2000-P: 32 to 100°F (0 to 38°C)
Detector Head SM-501: Series 60; SL2000: Series 65
Wire Size #14 to 22 AWG terminals
Humidity 10 to 85% RH, non-condensing
PDF File ACI/SM-2000 Brochure Discounted Pricing available for contractors, resellers and volume purchases
Contact us at Tel: 925-706-7433 or

Smoke Detectors

ACI/SM-501 Smoke Detector ACI/SM-501 Smoke Detector
Code: ACSM501
Price: $230.00
Quantity in Basket: none

ACI/SL-2000 Smoke Detector (Can be used with Round Ducts) ACI/SL-2000 Smoke Detector (Can be used with Round Ducts)
Code: ACSL2000
Price: $230.00
Quantity in Basket: none

Ecommerce Shopping Cart Software by Miva