Ajax DoorProtect Black Wireless Magnetic Door & Window Sensor

Ajax DoorProtect Black Wireless Magnetic Opening Detector

The Ajax DoorProtect is a compact wireless opening sensor built to guard doors, windows, and skylights against unauthorised entry. Designed for indoor use, this Black variant pairs a durable British-made reed switch with the encrypted Jeweller radio protocol, giving installers a fast, reliable way to add opening detection to any Ajax-based alarm system without running cables.

Key Features

• Long-life reed switch: A British-made reed switch rated for roughly 2 million operations ensures years of dependable triggering.
• Two-magnet kit: Includes a large magnet (effective up to 2 cm) and a small magnet (effective up to 1 cm) so it can be fitted to narrow window frames as well as standard doors.
• Long battery life: Runs on a single pre-installed CR123A battery rated for up to 7 years of typical use, minimising maintenance visits.
• Encrypted Jeweller connectivity: Communicates with an Ajax hub over the two-way Jeweller radio protocol at ranges of up to roughly 1,200 metres line-of-sight.
• Wired detector input: Features a normally closed (NC) terminal for integrating an existing or additional third-party wired detector into the Ajax ecosystem.
• Tamper protection: The SmartBracket mounting plate includes a perforated tamper section that triggers an alarm if someone attempts to remove the device.
• Doorbell/Chime mode: When paired with a compatible Ajax siren, it can double as a simple entry chime with several selectable tone patterns.
• Sleek black housing: A discreet, low-profile enclosure suited to modern door and window frames.

Reliable Protection for Homes and Businesses

DoorProtect Black is ideal for securing front and rear entry doors, sliding doors, ground-floor windows, and skylights in houses, apartments, offices, retail stores, and warehouses. Because it installs without wiring, it's especially useful for retrofitting existing doors or adding coverage to hard-to-wire openings, while its tamper alarm and encrypted communication keep the installation resistant to interference.

What's in the Box

• DoorProtect detector unit (Black)
• Large magnet
• Small magnet
• Pre-installed CR123A battery
• SmartBracket mounting panel and installation kit

Frequently Asked Questions

Does DoorProtect need a separate hub? Yes, it requires an Ajax hub to operate, as it communicates over the Jeweller radio protocol rather than working as a standalone unit.

Can it be used outdoors? No, DoorProtect is designed for indoor installation only and is not rated for outdoor exposure.

Can I connect an extra wired sensor to it? Yes, it includes an NC input that lets you connect a third-party wired detector, such as an additional opening or vibration sensor, into the same Ajax system.

Additional Resources

• More info