Door / Window Open Sensor with Ajax DoorProtect Plus Black Impact and Tilt Sensor

Product Code:
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Ajax DoorProtect Plus wireless magnetic door / window opening sensor with shock and tilt sensor is designed to detect the opening of doors, windows, etc. The sensor responds to opening, changing the angle of inclination and shock (sensitivity level is adjustable). An external wired sensor with contact type NC can be connected to DoorProtect Plus using a remote terminal.

Structurally, the sensor consists of two parts - a magnet and a unit with a reed switch. There are two options for the magnet - for parallel (large magnet) and perpendicular (small magnet) installation. The principle of operation of the opening sensor is based on the properties of the reed switch - an element that can become a conductor under the influence of a magnetic field. In normal condition, the magnet and the reed unit are closed. As soon as the door on which the sensor is installed opens, the magnet moves away from the reed switch, the contacts open and the reed switch ceases to conduct current. When the door is closed, reverse processes occur: the magnet approaches the reed switch, the contacts close and the reed switch begins to conduct current. In both cases, the sensor is triggered and instantly sends an alarm message to the central unit. An English reed switch is installed in the sensor, which does not stick and processes more than a million shorts / openings.

The tilt sensor integrated in the sensor detects the deviation of the device in the vertical plane by more than 5 °. DoorProtect Plus is installed on any window, including dormers. Its presence allows you to arm the system when the windows are open for ventilation (it is necessary to disable the magnetic sensor in the settings).

The sensor is equipped with an effective wireless radio communication system that uses message encryption and protection against forgery and jamming. This provides excellent security for alarms from hacking attempts. In addition, the sensor has an ultramodern highly reliable communication system that allows it to operate successfully within several floors of the building or at a distance of up to 1000 m in an open area from the central alarm unit.

The DoorProtect Plus sensor works only with the Ajax security system hub; connection to third-party security systems via the uartBridge or ocBridge Plus modules is not provided.

Magnet power is enough to install sensor modules with a mixture of up to 2 cm, so this wireless opening sensor can be used to protect any object: from apartments to industrial premises. An advantage of the sensor is its convenient and extremely easy independent installation using smart mounts; for installation, the user does not need to disassemble the case.


The sensor is easy to install and configure without special knowledge;

Mounting the sensor using smart mounts is convenient and will not damage the repair;

The sensor regularly transmits test signals to the central unit, and the polling period of the sensors can be adjusted at your own discretion. If the sensor is attempted to be stolen or broken, the central security system will immediately know about it and will give an alarm;

For reliable control of the alarm operation, the sensor regularly transmits a signal about the discharge of its battery to the central unit, the user will be notified in a timely manner of the need to replace the battery in the sensor;

The information transmitted by the sensor is protected from interception and attempted substitution;

The maximum distance between the sensor and the central unit is 1000 m in direct visibility;

The sensor uses a general-purpose frequency of 868 MHz for signal transmission, which does not require a license for use;

Adaptive adjustment of the transmission power, depending on the distance to the central unit, allows you to consume less battery power;

The threshold of the sensor reed switch is 2 cm (large magnet) / 1 cm (small magnet);

Adjustable tilt sensor threshold - more than 5 °;

Adjustable shock sensitivity (3 levels);

The function of skipping the first blow;

Implemented the ability to connect an additional wire sensor to the terminal block;

Sensor housing protected by tamper;

Thanks to a special energy-saving algorithm, the sensor runs on a CR123A battery for up to 5 years.


Detection Object
Detection Range (response threshold)
2 см
Maximum distance between sensors and control panel
Mounting type
Operating temperature range
От 0° до +50
Pet Immunity
Possibility of external use
Type of
Working humidity
До 80%
Дополнительные характеристики
Threshold: 1 cm / 2 cm;Sensor radio transmitter power: 20 mW;Sensor Modulation: FM;Trigger threshold for tilt sensor 5 ° or more;Sensitivity to shock;First hit skip function
20 х 90
24 mounth
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