System Sensor D4120 PhotoelectricSmoke24vac/dc120v PhotoelectricSmoke24vac/dc120v

PhotoelectricSmoke24vac/dc120v

The D4120 PhotoelectricSmoke24vac/dc120v has been discontinued. Please contact us for a suitable substitute. The System Sensor D4120 is a dual sensor smoke alarm with beeper. It will not sound if it begins to alarm due to low battery. Low voltage protection prevents the unit from malfunctioning due to fluctuating line voltages.

When your home is the only thing standing between fire and your family, it's important to have an early warning system in place. The System Sensor D4120 PhotoelectricSmoke detectors have a long battery life of 5 years and are UL approved for the ultimate in safety protection.

The D4120 is a wall-mountable Photoelectric smoke detector which features best-in-class optics, system reliability and fast configurability. It can be powered either by batteries or an external power supply.

System Sensor SD4120 Photoelectric Smoke Alarm meets UL217 standards for fire protection and is a three-in-one alarm system that can be powered by either 120 volt AC or 12 volt DC power.  Active LED display shows test and trouble codes in easy to read text, the programming/hush button is located on top of the unit, and the slim design allows for mounting directly on the wall or ceiling.

The D4120 Photoelectric Smoke Alarm features the latest advancements in smoke alarm technology including a 0.5-second photoelectric response time, exceptional sensitivity to light and an 85dB horn for optimum evacuation capabilities. This dual-powered smoke detector has a 10-year limited warranty when used with a compatible UL-approved central station or fire alarm control panel.

Digital Photoelectric Smoke Detectors

The System Sensor D4120 Photoelectric Smoke Alarm is a replacement alarm, providing you with peace of mind. It has both local and remote activations, Tamper Resistant Design, and is compatible with most current home security systems.