System Sensor 2WT-B Photoelectric i3 Smoke Detector, 2-Wire, 135F Fixed Thermal Sensor

  • MPN: 2WT-B
  • JMAC ID: 200003830
$52.90
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JMAC_ID:
200003830
df_manual_boost:
2.20
Please Note: In order to keep our prices low, we have a minimum order requirement of $99
The System Sensor 2WT-B is a 2-wire, photoelectric i3 smoke and heat detector.

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.

The i3 line redefines installation ease with its plug-in design. This allows an installer to pre-wire bases (included with heads). The large wire 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.

i3 detectors offer a number of intelligent features to simplify testing and maintenance. Drift compensation 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.

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.

UPC: 783863017605
Also known as: BK-2WTB, 2WTB

Technical Specifications:
  • Dimensions: 2.0" (51mm) H x 5.3" (127mm) Dia.
  • Weight: 6.3 oz. (178 g)
  • Wiring Gauge: 14-22 AWG
  • Sensitivity: 2.5%/ft. nominal
  • Freeze Trouble: 41°F (5°C)
  • Operating Humidity Range: 0% to 95% RH, noncondensing
  • Operating Temperature Range: 32° to 100°F (0° to 37.8°C)
  • Standby Current: 50 µA max. avg., 100 µA peak
  • Alarm Current: 130mA max., limited by panel
  • Maximum Ripple Voltage: 30% of nominal (peak to peak)
  • Operating Voltage: 12/24 V non-polarized nominal, 8.5 min. to 35 max.
  • Heat Sensor: 135°F (57.2°C) fixed
  • Detection: Photoelectric
  • Wiring: 2-wire


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

2 Reviews

  • 5
    SYSTEM-SENSOR-2WT-B

    Posted by 100811 on Jul 16th 2016

  • 5
    SYSTEM-SENSOR-2WT-B

    Posted by 94170 on Jan 27th 2016

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