Ajax MotionProtect Plus Fibra White Wired Indoor Motion Detector

Ajax MotionProtect Plus Fibra White Wired Motion Detector

The Ajax MotionProtect Plus Fibra is a professional-grade wired motion sensor built for indoor intrusion detection in homes, offices and commercial premises. It pairs a passive infrared (PIR) sensor with an additional K-band microwave sensor, so an alarm is only confirmed once both technologies agree that real movement has occurred. This dual-tech approach helps installers avoid the false alarms that plague single-sensor detectors, particularly in rooms with air conditioning, heaters, fireplaces or moving curtains. Connected to the hub via Ajax's proprietary Fibra wired bus, it combines the stability of a cabled system with the flexibility and quick configuration usually associated with wireless devices, making it a strong choice for sites where cabling is preferred or required.

Key Features

• Dual detection technology: PIR sensor works alongside a K-band microwave sensor that only activates once motion is first detected, reducing false triggers from thermal noise.
• Long detection range: Recognises movement at distances of up to 12 metres when mounted at the recommended height.
• Wide coverage angles: Horizontal detection angle of roughly 88.5° and vertical angle of around 80° for broad room coverage.
• Fibra wired protocol: Encrypted two-way communication with the hub, remote configuration through the Ajax app, and cable runs of up to 2,000 metres using standard U/UTP cat.5 twisted pair cable.
• Pet immunity: Ignores animals up to roughly 50 cm tall and 20 kg in weight when correctly installed and configured.
• Tamper protection: Built-in tamper button and SmartBracket mounting panel trigger an alert if the unit is removed or forced from the wall.
• Temperature-compensated performance: Maintains accurate detection across a wide ambient temperature range, including conditions close to human body temperature.
• Self-diagnostics: Continuously reports sensor, tamper and communication status to the hub so faults are flagged automatically.
• Clean white housing: Compact design that blends into most interior colour schemes.

Typical Use Cases

This detector suits hallways, living areas, offices, retail floors and storage rooms where a hard-wired sensor is preferred over a battery-powered device, such as new-build or renovation projects with pre-run cabling, or high-traffic commercial sites where long-term reliability and centralised cabling infrastructure matter. Its resistance to thermal false alarms also makes it well suited to spaces with air conditioning, heating vents or large windows exposed to sunlight.

What's in the Box

• MotionProtect Plus Fibra detector unit (white)
• SmartBracket mounting panel
• Mounting screws and fixings
• Quick start guide

Frequently Asked Questions

Does this detector need a hub? Yes, it operates only as part of an Ajax security system with a Fibra-compatible hub or range extender; it cannot function as a standalone device.

Can it be used outdoors? No, it is designed strictly for indoor installation and may give unreliable results if mounted outside.

Will pets set it off? When installed and configured correctly, it is designed to ignore small to medium pets up to approximately 20 kg and 50 cm tall.