Tech specs

DoorProtect G3 Fibra

Opening detector with shock, tilt, and magnetic masking sensors

DoorProtect G3 Fibra



Fibra communication technology

Proprietary wired communication technology. Fibra combines the reliability of wires with the freedom of radio connection.
Key features:
  • Two-way communication.
  • Advanced anti-sabotage protection.
  • Instant notifications.
  • Remote configuration via the Ajax apps.

Line connection

4-core cable

Fibra line length

up to 6,500 ft
When using the U/UTP cat.5 twisted pair cable.

Encrypted communication


Sensitive elements

1 accelerometer
1 magnetic masking sensor
2 reed switches

Protection against reed switch chattering

The detector ignores vibrations lasting up to 0.15 s.
Reed switches
The magnet can be installed to the left or right side of the detector.

Input to connect an additional detector

Wired detector with the normally closed (NC) contact type.
Additional detector connection

Shock sensor sensitivity

3 levels
Adjusted by a PRO or a user with admin rights in the Ajax app.

Option to ignore single impact

Adjusted by a PRO or a user with admin rights in the Ajax app.

Tilt sensor activation threshold

from 5° to 25°
Adjusted by a PRO or a user with admin rights in the Ajax app.
Tilt and shock sensitivity


2 pcs.
Are needed to install the detector or the magnet on a metal surface, as they help to reduce the distance between the detector and the magnet. You can use one or two spacers at once.


When the system is disarmed, the siren makes a special sound to notify that the opening detectors are triggered.


Do not install the detector using both magnets at the same time.
The detector recognizes only one magnet on one side of the detector — left or right.

The device is designed for indoor use only.

Sabotage protection

Tamper alarm

2 tampers
Notifications on attempts to detach the detector from the surface or open the front lid.

Magnetic masking sensor

The device detects an attempt to mask the main magnet of DoorProtect G3 Fibra with a fraudulent magnet.

Holding screw

to secure the detector on the mounting panel

Protection against spoofing

device authentication

Power supply

Fibra line power supply

5−30 V⎓, up to 35 mW
The detector is powered by the hub.


Detector dimensions

4.02″ × 0.83″ × 0.76″

Magnet dimensions

4.02″ × 0.83″ × 0.76″

Detector weight

2.19 oz

Operating temperature range

from 14 °F to 104 °F

Operating humidity

up to 75%



Complete set

DoorProtect G3 Fibra
Spacers — 2 pcs.
Installation kit
Quick start guide

Additional information

Compliance with standards


24 months

User manual