System Sensor 4WTAR-B i3 Series 4-Wire Photoelectric Smoke and Heat Detector, 135°F, Built-In Sounder, Form C Relay, White

Designed for dependable fire detection and straightforward installation, this 4-wire photoelectric smoke and heat detector combines a built-in sounder with a Form C relay. Its fixed-temperature heat sensing activates at 135°F, while drift compensation and smoothing algorithms help reduce nuisance alarms caused by dust accumulation and RF interference.

The plug-in design includes a base, in-line terminals, flexible mounting options, and a Stop-Drop ’N Lock™ attachment for convenient installation. Red and green LEDs indicate operating status, including power-up, standby, alarm, maintenance, and freeze trouble conditions. The removable cover and chamber support access for maintenance, and remote maintenance signaling is available when used with compatible equipment. In alarm, the sounder produces an 85 dB temporal tone.

Includes: 4-wire detector and base.