System Sensor 2WT-B i3 2-Wire Smoke and Heat Detector

System Sensor 2WT-B Photoelectric i3 Series Smoke and Heat Detector, 2-Wire, 135°F Fixed Thermal Sensor, White (Replaces 2100T)

The System Sensor 2WT-B is a 2-wire photoelectric smoke and heat detector from the innovative i3 Series, designed to provide reliable fire detection while simplifying installation, testing, and long-term maintenance. Replacing the 2100T, this detector combines advanced photoelectric smoke sensing with a 135°F (57°C) fixed-temperature thermal sensor to deliver dependable protection for a wide range of commercial and residential applications.

Its advanced optical sensing chamber provides fast detection of visible smoke while reducing nuisance alarms caused by dust and airborne contaminants. The integrated fixed-temperature heat sensor offers an additional layer of fire protection, making the 2WT-B suitable for areas where both smoke and heat detection are desirable.

Designed for installer convenience, the 2WT-B features a plug-in design with a large wire entry port that allows clean, efficient wiring. The detector is compatible with multiple mounting methods and includes wide-angle red and green LEDs that provide clear visual indication of detector status, including normal operation, alarm, maintenance, out-of-sensitivity, and freeze trouble conditions.

As part of the System Sensor i3 Series, the 2WT-B incorporates intelligent drift compensation and smoothing algorithms that continuously adjust detector sensitivity to help reduce nuisance alarms and extend maintenance intervals. When used with the optional 2W-MOD2 maintenance module or compatible fire alarm control panels supporting the i3 protocol, additional features such as EZ Walk Loop Test and remote maintenance indication further simplify system testing and servicing.

Key Features

• 2-wire photoelectric smoke and heat detector

• Replaces the System Sensor 2100T

• 135°F (57°C) fixed-temperature thermal sensor

• Advanced photoelectric smoke sensing technology

• Intelligent drift compensation

• Smoothing algorithms reduce nuisance alarms

• Plug-in design for fast installation

• Large wire entry port for neat wiring

• Wide-angle red and green LED status indicators

• Out-of-sensitivity and maintenance indication

• Freeze trouble indication

• Compatible with the optional 2W-MOD2 maintenance module

• EZ Walk Loop Test capability with compatible systems

• Compatible with i3 protocol fire alarm panels

• Genuine System Sensor i3 Series detector

Applications

The System Sensor 2WT-B is ideal for:

• Office buildings

• Schools and universities

• Hotels

• Hospitals and healthcare facilities

• Apartment buildings

• Retail stores

• Warehouses

• Residential buildings

• Commercial buildings

• Conventional fire alarm systems

Specifications

• Manufacturer: System Sensor

• Model: 2WT-B

• Product Series: i3 Series

• Product Type: Photoelectric Smoke and Heat Detector

• Wiring: 2-wire

• Detection Method: Photoelectric Smoke and Fixed Temperature Heat

• Fixed Temperature Rating: 135°F (57°C)

• Housing Color: White

• Installation: Indoor

• Mounting: Plug-in

• LED Indicators: Red and Green, wide-angle visibility

• Maintenance Features: Drift compensation and automatic sensitivity monitoring

• Optional Accessories: 2W-MOD2 Maintenance Module

• Special Features: EZ Walk Loop Test, remote maintenance indication, freeze trouble monitoring

• Replacement For: 2100T

• Compliance: UL 268 and UL 521

Why Choose the System Sensor 2WT-B?

The System Sensor 2WT-B combines dependable photoelectric smoke detection with a 135°F fixed-temperature heat sensor in a single, intelligent detector. Its i3 Series technology minimizes nuisance alarms through automatic drift compensation while simplifying maintenance with built-in diagnostics and compatibility with EZ Walk Loop Test. Easy installation, reliable performance, and advanced maintenance features make the 2WT-B an excellent choice for protecting commercial and residential properties.