System Sensor 4WTR-B Smoke Detector and Thermal Sensor 4-Wire

System Sensor 4WTR-B i3 4-Wire Photoelectric Smoke Detector

The System Sensor 4WTR-B i3 Series Smoke Detector combines photoelectric smoke detection, a fixed-temperature thermal sensor, and a Form C relay in a single device for dependable fire detection in commercial, residential, and light industrial applications. As part of the System Sensor i3 Series, it incorporates intelligent features that simplify installation, maintenance, and ongoing system monitoring.

Designed for use with conventional 4-wire fire alarm systems, the 4WTR-B features automatic drift compensation, remote maintenance signaling, dual-color LED status indication, and a plug-in design with an included mounting base. Its integrated 135°F (57.2°C) fixed-temperature thermal sensor and Form C relay provide enhanced system functionality while reducing installation time and maintenance costs.

Key Features

• 4-wire photoelectric smoke detector

• Part of the System Sensor i3 Series

• Integrated 135°F (57.2°C) fixed-temperature thermal sensor

• Built-in Form C relay

• Automatic drift compensation

• Remote maintenance signaling

• Wide-angle dual-color LED status indication

• Plug-in detector with mounting base included

• Stop-Drop N Lock™ installation

• Large wire entry port

• In-line terminals with SEMS screws

• Built-in test switch

• EZ Walk loop testing capability

• Removable sensing chamber for simplified maintenance

• Compatible with conventional 4-wire fire alarm systems

• Genuine System Sensor smoke detector

Applications

The System Sensor 4WTR-B is ideal for:

• Commercial buildings

• Office buildings

• Schools and universities

• Healthcare facilities

• Hotels

• Apartment buildings

• Retail stores

• Light industrial facilities

• Conventional 4-wire fire alarm systems

Specifications

• Manufacturer: System Sensor

• Model: 4WTR-B

• Product Series: i3 Series

• Product Type: 4-Wire Photoelectric Smoke Detector

• Detection Technology: Photoelectric

• Thermal Sensor: 135°F (57.2°C) fixed-temperature

• Relay Type: Form C

• Wiring: 4-wire

• Mounting Base: Included

• LED Indicator: Wide-angle dual-color LED

• Drift Compensation: Automatic

• Remote Maintenance Signaling: Yes

• Built-in Test Switch: Yes

• EZ Walk Testing: Supported

• Mounting Options: Direct ceiling mount, octagonal back box, single-gang back box, or 4-inch square back box with plaster ring

• Application: Conventional fire alarm systems

Why Choose the System Sensor 4WTR-B?

The System Sensor 4WTR-B combines intelligent smoke detection, fixed-temperature heat detection, and relay functionality in a single device. With automatic drift compensation, simplified maintenance, easy plug-in installation, and compatibility with a wide range of conventional fire alarm systems, it is an excellent solution for reliable fire protection in commercial, residential, and light industrial applications.