AJAX DualCurtain Outdoor
The AJAX DualCurtain Outdoor detector is a so called curtain detector especially for outdoor use. The DualCurtain is equipped with multiple Pir sensors to detect movements up to 15 meters per side. The advantage of this AJAX DualCurtain compared to the Optex Curtain is that you not only have two detection strips to both sides, but also on both sides a strip sharply downwards at an angle of 40 degrees. This allows you to detect unwanted persons very close to the detector and low to the ground. We illustrate this with an image of the detection strips being transmitted invisibly as seen from the front, also called side view.
Seen from above, the sensors radiate to both sides in this way up to a distance of 15 metres. If there are, for example, drainpipes or other obstacles on the outer walls, it is possible to set the angle of the detection beams 3 degrees further away from the wall so that they can easily see past a drainpipe.
Where to place the AJAX DualCurtain Outdoor
An ideal location to mount the AJAX DualCurtain Outdoor detector is on the facade of your home in locations close to windows and doors.
The AJAX DualCurtain Outdoor is a detector that gets its name from the way the detection beams run. These beams fall like a curtain along the facade of your house and only detect the people who are close to the house. So in the picture above you could walk on the grass without being noticed, but as soon as you walk towards the house on the tiles the alarm will sound.
The mounting height of the AJAX DualCurtain Outdoor is ideal at 1 meter, but should always be between 80 and 120 centimetres.
The ideal thing about this DualCurtain is that it detects movement on both sides and over a distance of at least 3 to 15 metres, depending on the settings selected. This means that you can protect one side of the house with two times 15 metres, or 30 metres, with just one detector.
The different possibilities in the settings are as follows:
The image on the left shows the settings in the AJAX app where you indicate if the detector is allowed to detect, at what sensitivity, and if anti-mask should be checked. A notification will then be given if the detector is covered in any way.
The picture on the right shows the settings as they are on the detector itself. We will discuss the functions one by one.
“Near area detection” left side area and right side area can be switched on or off. This means the detection line that radiates 40 degrees downwards as shown on the “side view” picture. If you set the switch to on, the low detection zone will be activated on that side.
“Beam direction” determines the angle as the sensor beam looks along the façade. On the picture where the beams are shown from above, the 0 degree setting is shown in green. The 3 degrees setting is shown translucent. You set the switch to 3 degrees if the view of the sensor is blocked by, for instance, a rain pipe on that side of the detector.
“Detection distance” has 5 settings per side and determines the distance in which the detector should detect. Near means a distance of 3 metres and far a distance of 15 metres. Each point in between is a distance of 3 metres, so if you set the switch to the second point from the top, the detection distance on that side will be about 6 metres. The distance is also determined by the height at which you mount the detector. At a height of 80 cm, the distance will be less with the same “detection distance” setting than if the detector is mounted at 120 cm height. So always do a detection zone test to make sure you are setting the right values in the settings.