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System Sensor 4WTR-B i3 Series 4-Wire Photoelectric Smoke Detector with 135°F Heat Sensor and Form C Relay, White

Price: $209.00Model: 4WTR-B
In stock — ready to ship Free US shipping on orders $500+ · $291.00 to go
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System Sensor 4WTR-B i3 Series 4-Wire Photoelectric Smoke Detector with 135°F Heat Sensor and Form C Relay, White1 / 3
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About the 4WTR-B

Designed for straightforward installation and reliable monitoring, this 4-wire photoelectric smoke detector features an installer-friendly base with space for pre-wiring and broad back-box and direct-mounting options. Its plug-in Stop-Drop ’N Lock design helps simplify attachment and inspection.

The detector includes an 85 dB sounder, Form C relay, isolated thermal sensor, and 135°F heat sensor. In-line terminals, simplified sensitivity measurement, a removable cover and chamber, and remote maintenance signaling support convenient installation and upkeep. Drift compensation and smoothing algorithms help maintain detector performance.

What’s Included
4-wire photoelectric smoke detector
Mounting base

Specifications

BrandSystem Sensor
Model4WTR-B
Product typeCombination Smoke and Heat Detector

Specs are taken from the manufacturer listing. Need a detail that isn't here? Ask us.

In the box

    Shipping & returns

    Shipping (US)

    • Free standard shipping on orders of $500 or more
    • Standard shipping $8.00 on orders under $500
    • Express shipping $15.00

    Returns

    • 30 days from delivery to request a return
    • Item must be unused, in its original packaging with all parts
    • Contact us first for a return authorization
    Full return policy →