The 4WT-B is a 4-wire, photoelectric i3 smoke detector with a 135°F fixed thermal sensor.

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.

Features

• 85 dB sounder
• Form C relay
• Isolated thermal sensor
• Plug-in design (base included)
• In-line terminals
• Simplified sensitivity measurement
• Stop-Drop 'N Lock attachment to the base
• Removable cover and chamber
• Remote maintenance signaling
• Drift compensation and smoothing algorithms