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

System Sensor 2W-B Two-Wire Photoelectric Smoke Detector

The System Sensor 2W-B is a two-wire photoelectric smoke detector from the i3 Series, designed to provide reliable smoke detection while simplifying installation, testing, and maintenance.

Compatible with many conventional two-wire fire alarm control panels, the 2W-B combines photoelectric sensing technology with intelligent maintenance features including automatic drift compensation, remote maintenance signaling, and sensitivity monitoring.

The detector features a plug-in design with a mounting base, allowing installers to wire and mount the base before attaching the detector head. Wide-angle dual-color LED indicators provide clear visual information about detector status, while the built-in test switch simplifies routine inspection and testing.

The 2W-B is suitable for residential, commercial, and light industrial applications requiring dependable conventional two-wire smoke detection.

Key Features

• Two-wire photoelectric smoke detector

• System Sensor i3 Series

• Photoelectric sensing technology

• Plug-in detector design

• Mounting base included

• Automatic drift compensation

• Remote maintenance signaling capability

• Wide-angle dual-color LED indicators

• Built-in test switch

• Stop-Drop N Lock installation design

• Large wire entry port

• In-line terminals with SEMS screws

• EZ Walk loop testing capability

• Compatible with optional SENS-RDR sensitivity reader

• Multiple ceiling and back box mounting options

• Compatible with many conventional two-wire fire alarm control panels

• Designed for easy installation and maintenance

• Suitable for residential and commercial applications

Photoelectric Smoke Detection

The 2W-B utilizes photoelectric sensing technology to detect smoke particles entering the sensing chamber.

Photoelectric detection is particularly effective at detecting visible smoke particles commonly associated with slow-developing and smoldering fires, providing dependable detection for a broad range of residential and commercial applications.

Automatic Drift Compensation

Automatic drift compensation helps the 2W-B maintain consistent sensitivity as dust and other environmental contaminants gradually accumulate within the sensing chamber.

The detector automatically compensates for these gradual changes within its operating limits, helping maintain reliable detection performance and reducing unnecessary maintenance.

Remote Maintenance Signaling

The 2W-B supports remote maintenance signaling when used with compatible equipment.

This functionality allows the system to identify detectors that have moved outside acceptable sensitivity limits, helping technicians determine which devices require cleaning, inspection, or replacement.

The optional System Sensor SENS-RDR wireless sensitivity reader can also be used to measure detector sensitivity in percent-per-foot obscuration, simplifying inspection and maintenance procedures.

Easy Plug-In Installation

The i3 Series plug-in design allows the mounting base to be installed and wired separately from the detector head.

This approach simplifies initial installation and future servicing while helping protect detector electronics during construction.

The Stop-Drop N Lock design helps installers quickly and securely attach the detector to its mounting base.

LED Status Indicators

Wide-angle dual-color LEDs provide clear visual indication of detector operation.

• Green indicates normal standby operation

• Red indicates an alarm condition

• Additional LED patterns can indicate maintenance or trouble conditions

The wide viewing angle makes detector status easier to identify during inspection and troubleshooting.

EZ Walk Loop Testing

When used with compatible equipment such as the System Sensor 2W-MOD2 module, the EZ Walk loop test functionality helps technicians quickly verify detector operation and wiring.

Visual LED indications at individual detectors simplify system inspection and can reduce the amount of time required for routine testing and maintenance.

Mounting Options

The System Sensor 2W-B supports several installation methods, including:

• Direct ceiling mounting

• Single-gang back boxes

• 3.5-inch and 4-inch octagonal back boxes

• 4-inch square back boxes

This flexibility makes the detector suitable for both new construction and existing fire alarm system installations.

Applications

The System Sensor 2W-B is ideal for:

• Residential properties

• Apartment buildings

• Commercial buildings

• Office buildings

• Schools and universities

• Retail stores

• Healthcare facilities

• Hotels

• Light industrial facilities

• Conventional fire alarm systems

• New installations

• System upgrades and replacements

Specifications

Why Choose the System Sensor 2W-B?

The System Sensor 2W-B combines photoelectric smoke detection, two-wire operation, automatic drift compensation, remote maintenance capabilities, and a plug-in installation design in a versatile conventional detector.

Its maintenance and testing features make it particularly useful for contractors and facility professionals responsible for larger installations, while its broad application range makes the 2W-B a dependable choice for residential, commercial, and light industrial fire detection systems.