Motion detector for security alarm Ajax MotionProtect Plus Jeweller with the microwave sensor

The motion detector is often installed to turn on the lighting when a person enters the controlled area and turn it off when they leave. The device helps to save electricity and eliminates the need to turn on the light mechanically.

Motion sensors are also installed in burglar alarm systems. The device detects intruders' attempts to enter the premises. In addition, motion sensors are used on production lines to automate technological tasks.

Types of presence detectors

Presence sensors are distinguished by the principle of operation on which their accuracy of the process and the features of use and installation depend. The price of motion sensors depends on the design and type of element used.

Contact motion sensors for signaling

The essence of this type of motion detector is installing a reed switch on the door. A reed switch (sealed contact) is a switch that works when a magnetic field appears. The contacts will close when someone opens the door and enters the room. The alarm control panel will receive the incident signal, and the lighting or a siren will be activated.

Infrared motion detectors

Infrared motion sensors are triggered by thermal radiation and react to temperature changes in the room. When an object enters the field of view of such a detector, it will respond to the thermal radiation that comes from the body. A PIR sensor is used as a sensitive element of the device, which creates an electric field proportional to thermal radiation.

Ultrasonic presence sensors

The ultrasonic motion sensor operates at high frequencies from 20 kHz to 60 kHz. The negative feature of this sensor is its irritation with the frequencies of animals that are sensitive to them.

Ultrasonic presence sensors work on the Doppler effect. The receiver returns and receives the sensor wave reflected from the moving object. In this case, the frequency of the wave slightly changes. This is detected, and the detector sends a signal to the control panel.

Photosensors or laser motion sensors

Laser motion sensors have an emitter, an infrared LED, and a receiver, a photodiode of the same spectrum. This is a simple detector, the implementation of which is possible in two versions:

  1. The emitter and the photodiode are installed next to each other. When the object is in the detector's coverage area, its radiation is reflected and falls on the photodiode. Such a device is also called an obstacle sensor and is often used in robotics.
  2. The photodiode and the emitter are installed in the protected area opposite each other. When an object passes through it, it obscures the radiation and does not reach the receiver, after which the motion sensor is triggered, and the relay is turned on — used in alarm systems.

Microwave presence detector

The microwave motion sensor consists of a transmitter and a receiver. The first one generates high-frequency signals, and the second one receives them. When an object passes nearby, the frequency changes. When the frequency changes, the signal is amplified and transmitted to the alarm relay, and the load is turned on. Microwave sensors are susceptible and can detect movements even behind a door or glass. They react even to the most accurate movements and are often used in burglar alarm systems.

Presence detector with microwave sensor MotionProtect Plus Jeweller

Ajax MotionProtect Plus Jeweller is a wireless presence detector with a microwave sensor that reports the first signs of an intrusion into a protected area. The device is installed both in private premises and in public places. The motion sensor ignores air currents from fireplaces, air conditioners, reflections, and light.

The motion sensor detects a person by comparing temperature differences with background thermal radiation. A microwave sensor eliminates false alarms even due to complex interference.

The principle of operation of the MotionProtect Plus Jeweller wireless motion sensor

The MotionProtect Plus Jeweller is a wireless motion detector with RF signal interference scanning that detects human movement in a protected area. The motion sensor detects a person's appearance in the room from the first seconds. Still, it ignores drafts, the movements of pets weighing up to 20 kilograms, and the operation of the air conditioner. RF scanning filters interference that creates thermal radiation with the movement of curtains and glare. The sensitivity of the motion detector is adjustable by the user individually.

The MotionProtect Plus Jeweller, a wireless motion sensor, has a radio communication system that protects data against forgery and encrypts transmitted messages. This ensures that the signaling is protected from hacking attempts by intruders. In addition, the wireless detector has a highly reliable communication system that allows it to operate within several floors of a building or up to 1200 m away from the central alarm unit, provided there are no obstructions.

Installation of the motion sensor MotionProtect Plus Jeweller

One of the advantages of the MotionProtect Plus Jeweller wireless motion sensor is its convenient installation on an intelligent mount. To install the device, you do not need to disassemble the body and spoil the interior by laying wires.

The device's battery is already installed and will ensure the wireless motion sensor's operation for up to five years.

Conclusion

The use of motion detectors helps save energy and resources for lighting devices. This is a step towards the smart home and routine automation.

Also, a motion sensor is an indispensable element of a security system that will help prevent intrusion into a protected area, theft, and property damage.

  • The wireless motion sensor MotionProtect Plus Jeweller is designed to work in rooms with air conditioning and a fireplace. The device recognizes and ignores drafts, movement of curtains, light, and reflections.
  • Convenient installation on the SmartBracket mount without disassembling the case and connection to the security system via a QR code. The pre-installed battery lasts up to 5 years without replacement.
  • Ability to integrate into a third-party security system through modules uartBridge and ocBridge/ocBridge Plus.
  • The wireless motion detector MotionProtect Plus Jeweller works up to 1200 meters from the central security system without obstacles. The motion detection range of the sensors is up to 12 m. Three levels of sensitivity are available, which the user adjusts independently.
  • The SmartMotion detection algorithm does not react to pets weighing less than 20 kg, eliminating frequent false alarms.
  • A tamper protects the case of the device from forgery and opening.
  • Pings check the performance of the wireless motion sensor with a frequency of 12 seconds, and in the event of a sensor failure, the user will be instantly aware.