System Sensor 2W-B Photoelectric i3 Smoke Detector, 2-Wire

  • JMAC SKU: SYSTEM-SENSOR-2W-B
$69.99
+ Free Shipping
In Stock
Standards met: UL, FM, MEA, MSFM and cETLus

Agency listings A detector you can trust. The System Sensor 2WB is a 2-wire, photoelectric i3 smoke detector.

Technological breakthrough: System Sensor i3 series smoke detectors represent significant advancement in conventional detection. The i3 family is founded on three principles: installation ease, intelligence, and instant inspection.

Easy to install. The i3 line redefines installation ease with its plug-in design. This allows an installer to pre-wire bases (included with heads). The largewire entry port and in-line terminals provide ample room for neatly routing the wiring inside the base. The base accommodates a variety of back box mounting methods as well as direct mounting with drywall anchors. To complete the installation, i3 heads plug into the base with a simple Stop-Drop \'N Lock action.

Game changing features. i3 detectors offer a number of intelligent features to simplify testing and maintenance. Driftcompensation and smoothing algorithms are standard with the i3 line to minimize nuisance alarms. 2-wire i3 detectors can generate a remote LED indicated maintenance signal when connected to the 2W-MOD2 loop test/maintenance module or a panel equipped with the i3 protocol. The SENS-RDR, a wireless device, displays the sensitivity of i3 detectors in terms of percent-per-foot obscuration.

Instant Inspection: The i3 series provides wide-angle red and green LED indicators for instant inspection of the detector\'s condition: normal standby, out-of-sensitivity, alarm, or freeze trouble. When connected to the 2W-MOD2 loop test/maintenance module or a panel with the i3 protocol, the EZ Walk loop test feature is available on 2-wire i3 detectors. This feature verifies the initiating loop wiring by providing LED status indication at each detector.

If you have any questions, are looking for tech support, have a question about changing the battery, cleaning your smoke detector, or a beeping sound on your smoke detector, please feel free to contact usat (516) 812-0917 and a member of our team will be happy to assist you.

Buy with confidence from a trusted seller. Customer Satisfaction is Always Guaranteed.

Also Known As: 2WB, BK-2WB.

UNSPSC: 46191501.

UPC: 783863017599
Also known as: BK-2WB, 2WB

Technical Specifications:
  • Smoke Detection Type: Photoelectric
  • Wiring: 2-wire
  • Operating Voltage: 12/24 V non-polarized nominal, 8.5 min. to 35 max.
  • Maximum Ripple Voltage: 30% of nominal (peak to peak)
  • Alarm Current: 130mA max., limited by panel
  • Standby Current: 50 µA max. avg., 100 µA peak
  • Operating Temperature Range: 32° to 120°F (0° to 49°C)
  • Operating Humidity Range: 0% to 95% RH, noncondensing
  • Sensitivity: 2.5%/ft. nominal
  • Wiring Gauge: 14-22 AWG
  • Dimensions: 2.0" (51mm) H x 5.3" (127mm) Dia.
  • Weight: 6.3 oz. (178 g)


For more information about the System Sensor 2W-B, please contact us.
  • Plug-in detector line, mounting base included
  • Large wire entry port
  • In-line terminals with SEMS screws
  • Mounts to octagonal and single-gang back boxes, 4-square back boxes, or direct to ceiling
  • Stop-Drop ’N Lock attachment to base
  • Removable detector cover and chamber
  • Built-in remote maintenance signaling
  • Drift compensation and smoothing algorithms
  • Simplified sensitivity measurement
  • Wide-angle, dual-color LED indication
  • Loop testing via EZ Walk feature
  • Built-in test switch

4 Reviews

  • click to add click to add click to add click to add click to add 5
    SYSTEM-SENSOR-2W-B

    Posted by 167232 on Feb 21st 2021

  • click to add click to add click to add click to add click to add 5
    SYSTEM-SENSOR-2W-B

    Posted by 90360 on Oct 22nd 2015

  • click to add click to add click to add click to add click to add 5
    SYSTEM-SENSOR-2W-B

    Posted by 70901 on Jun 9th 2014

  • click to add click to add click to add click to add click to add 5
    SYSTEM-SENSOR-2W-B

    Posted by 69540 on May 5th 2014