Ajax DoorProtect G3 Fibra White Wired Door & Window Opening Detector

Ajax DoorProtect G3 Fibra White Wired Opening Detector

The Ajax DoorProtect G3 Fibra is a wired, Grade 3 opening detector built for professional intrusion detection on doors, windows, skylights and vaults. Using Ajax's proprietary Fibra wired protocol, it delivers the reliability of a hard-wired connection with the fast two-way communication and remote configuration usually associated with wireless devices. Combined shock, tilt and anti-masking sensors give installers a single compact device capable of covering multiple threat scenarios on one opening point.

Key Features

• Fibra wired technology for secure, two-way communication with the hub over distances of up to 2,000 metres using U/UTP cat.5 cable.
• Dual reed switches allowing the magnet to be fitted on either the left or right side of the detector for flexible installation.
• Built-in shock sensor that reacts to vibration from attempts to force a lock or break a door or window frame.
• Tilt sensor that detects angle changes greater than roughly 5°, useful for protecting tilted or ventilation-mode windows and skylights.
• Magnetic masking protection that compares live magnetic field readings against a calibrated baseline to detect fraudulent magnet spoofing attempts.
• Grade 3 security rating in line with EN 50131 and PD 6662:2017, suitable for higher-risk commercial and residential installations.
• Rotatable front lid (180°) and rear/bottom wire routing options for a clean, adaptable installation.
• Durable reed switches rated for a very long mechanical service life, reducing long-term maintenance needs.
• Tamper protection that alerts if the enclosure is opened or the detector is pried from its mounting surface.

Where It's Used

DoorProtect G3 Fibra suits installers who need dependable, cable-based intrusion detection for entry doors, ground-floor windows, skylights and secure storage areas. Because it runs on the Fibra wired backbone rather than radio signals, it is a strong choice for larger commercial sites, warehouses or buildings with heavy RF interference where a stable wired connection is preferred over battery-powered wireless sensors. The combined opening, shock and tilt sensing means a single unit can often replace what would otherwise require two or three separate detectors.

What's in the Box

• DoorProtect G3 Fibra detector (white)
• Magnet
• Mounting spacers
• Mounting panel for the detector enclosure
• QR code sticker for quick pairing
• Quick start guide

Frequently Asked Questions

Does this detector need batteries?
No. It is a wired device powered directly through the Fibra cable connection from the hub, so there are no batteries to replace.

Which hubs is it compatible with?
DoorProtect G3 Fibra connects to Ajax Hub Hybrid (2G) and Hub Hybrid (4G) control panels via the Fibra wired line.

Can it be used on both doors and windows?
Yes. Its combined opening, shock and tilt sensors make it suitable for doors, windows, skylights and similar openings, including windows left in ventilation mode.