First Alert Alarm Set

How does the magnetic contact alarm system actually work?

The alarm operates by detecting separation between the main unit and the magnet sensor. When the door or window opens beyond a small gap, the magnetic separation triggers the reed switch, activating the loud siren or chime.

Is this alarm set difficult to install, or do I need tools?

No, installation is designed to be tool-free. You typically use included double-sided adhesive tape to mount the main unit and magnet to clean surfaces. Simply ensure the magnet and sensor align correctly when the door or window is closed.

Can I use this alarm on things other than doors and windows?

Yes, magnetic contact alarms are versatile and can secure more than just entry points. They are commonly used for monitoring cabinets, drawers, freezers, and even gates, in addition to doors and windows.

What is the difference between the alarm mode and the chime mode?

Alarm mode activates a loud, continuous siren designed to immediately deter intruders. Chime mode provides a softer, audible notification, which is useful for monitoring daily entry awareness, such as for kids or guests.

Does this alarm require electrical wiring, or is it battery-powered?

This is a standalone, battery-powered unit. It functions independently of household power, making it ideal for renters or temporary security setups where wiring is not possible.

What should I do if the alarm keeps going off falsely?

If you experience false alarms, first check the alignment and gap between the magnet and the sensor when the unit is closed. Additionally, ensure the mounting surfaces are clean and that the units are securely attached.

How loud is the alarm, and what kind of batteries does it use?

The alarm can reach up to 120 dB, providing a loud deterrent audible within the home. These units are battery-powered and typically require LR44 or similar batteries, with low-battery indicators to alert you when replacement is needed.