Outdoor motion detectors for alarm

Protecting the perimeter of both private premises and enterprises needs signal protection. Installing a motion sensor is suitable for detecting and fixing movement in the controlled area.

Types of detectors and how they work

Types of outdoor detectors by location

1. Perimetric — the type of motion detectors installed along the territory's perimeter which determines the movement in the protected area.
2. Peripheral presence sensors — are mounted on the facades of houses and fences. Such a sensor detects a moving object if the action limits are violated.

The principle of operation of outdoor security detectors

An electronic security motion detector for outdoor installation is equipped with a microwave, optical or acoustic sensor, and often a signalling device for lighting control. The sensor captures changes in the field of action, after which, when presence is detected, it transmits an alarm signal to the alarm control panel, which activates the siren.

Presence detectors for signalling, for the most part, operate in a diameter of five metres, but industrial sensors detect movement at a distance of 10-15 metres. A motion detector is used for installation in industrial areas, to which a flashlight or spotlight is connected.

According to the type of radiation, motion sensors for alarms are divided into

• Infrared sensor — used to protect the land. Infrared motion detectors for alarms are sensitive to the temperature of the human body in motion, which is recognised by radiation. This type of radio sensor is used in domestic conditions.
• Microwave sensor — the operation concept is based on the principle of Doppler's rays. The sensor emits a constant signal that a person will not feel, but it activates the siren when the boundaries are violated.
• Ultrasonic sensor — the principle of operation is similar to the previous type of sensor. This kind of motion sensor can work around the clock.

Advantages of having a motion detector

The presence detector for outdoor installation protects the premises and property owners. Additionally, it can be equipped with a video surveillance camera and control the light. The motion detector can control the alarm, halogen light, fire system and other protection mechanisms.

Installation of the street presence sensors

Presence detector installation methods depend on the selected device type. Most detectors are connected using a 220V power cable, but wireless outdoor security motion sensors are becoming increasingly popular. This type of detector is more efficient than a wired one, as it continues to work in extreme conditions due to autonomous communication. In most cases, wireless outdoor motion sensors are operated by batteries or accumulators.

How to connect the presence sensor:

1. It is necessary to develop a motion sensor connection project before installation. To do this, you need a site plan. When planning the detector placement, it is worth considering that communication pipes, especially heating ones, should be far from it. And also, users need to avoid direct sunlight on the device and obstructions to the signal.
2. The instructions will be provided with the chosen detection device, where there is an item: installation tips. Depending on the type of outdoor detector, it must be connected in parallel or in series. When installed in parallel, the sensor and the central panel are opposite. When connected in series, the detector is mounted first, and then the signal receiver or switch.
3. The following steps vary by manufacturer. In most cases, a mounting kit is included with the motion sensor.

Outdoor bidirectional security motion curtain detector Ajax DualCurtain Outdoor Jeweller

The DualCurtain Outdoor Jeweller wireless motion sensor detects and prevents intrusion in a guarded area. The detector ignores animals up to 80 cm and birds. Weather factors also do not cause false alarms. The device is protected from unauthorised influence by intruders — varnishing, dismantling, hanging, protected from dust and splashes and operates at air temperatures below 0 ° C. The operating range is adjustable up to 30 metres.

The principle of operation of the DualCurtain Outdoor Jeweller motion detector

The DualCurtain Outdoor Jeweller motion sensor for signalling detects human movement using two built-in independent IR sensors that detect the infrared radiation of living beings. A two-factor ELSA algorithm checks the data received by the device. It determines the similarities and spectral patterns between two sensor signals, which helps to avoid false alarms. The sensor range is adjustable up to 30 metres, 15 metres in each direction.