Earlier today, I was wondering why I would select an Ajax MotionProtect Curtain instead of a Regular MotionProtect, and I’ve managed to find some points, so this material is going to be an answer to that question. Except that, we will overview the MotionProtect Curtain intended main functionality, uncover the specs, connect it, and test it out practically (in video).
How does it look?
The box contents are standard for Ajax: a cardboard wrapping with the sensor itself, an external bracket, a quick start guide, and a pack of screws and anchors to mount the device on a wall. The sensor features an LED indicator at the top of the front panel, in the signature Ajax shape.
The main element we really care about is located at the bottom, behind a Fresnel lens — similar to the one used in MotionProtect — housed inside an inclined cutout. The purpose of this design is to ensure the sensor is mounted as high as possible, either just below the ceiling or at the top of a doorway, to achieve the correct observation angle.
And this is where the key difference lies between the Curtain and the MotionProtect. The Curtain sensor has a very narrow 6° field of view, while the MotionProtect offers a much wider 88.5° angle. Installed correctly, a MotionProtect can cover an entire room or at least half of it, whereas the MotionProtect Curtain projects a narrow, vertical detection beam — essentially a straight line from top to bottom. This makes it ideal for perimeter protection.
Removing the rear bracket is straightforward, revealing the QR code and the power button that will be needed to activate the device. Below those, you’ll also find a tamper button for added security.
What Ajax Curtain Is Capable Of?
- Motion Detector
- Dual Infrared Sensor (PIR)
- Detection up to 15m. Distance
- IP-54 Protection Rate
- 1,800 m. Operating range
- 12-300 s. Pings Frequency
- Ajax Jeweler Radiotechnology
- Battery Life Up To 3 years
So yes, the device is intended for perimeter protection and is often installed indoors near an entrance door. The operating principle remains the same: the infrared sensor detects moving objects that emit heat close to human body temperature. However, in this case, we have a dual infrared sensor setup, which is highlighted both on the box and in the Ajax App under the sensor’s settings tab.
There you will find the Correlation Signal Processing option, which helps reduce false alarms by ensuring the sensor only triggers an alert when an identical motion signal is detected by both sensors simultaneously. This is an essential feature if you have pets at home.
As for the features and specifications, the Motion Detection distance works reliably up to 15 meters. The sensor is IP54-rated for ingress protection, and it can operate at a distance of up to 1,800 meters from an Ajax Hub, with the Hub polling the sensor’s status every 12 to 300 seconds.
The MotionProtect Curtain is equipped with Ajax’s proprietary Jeweller radio technology, and the built-in battery is designed to last up to 3 years.
Activation & Test
Conclusion
Many of you may be wondering why you would choose a Curtain sensor instead of a MotionProtect or CombiProtect. The answer depends entirely on the installation location. The Curtain sensor is best suited for areas such as warehouses, where there are many moving objects within the sensor’s field of view, and where high shelving units may limit the view angle and trigger false alarms.
In the case of the Ajax MotionProtect Curtain, it doesn’t matter what kind of interior layout or obstacles you have in the room — its primary function is perimeter protection. It monitors a defined virtual line that separates entry and exit points. Additionally, the Curtain sensor can operate effectively in Night Mode, which is not possible with MotionProtect or CombiProtect. This makes it an excellent choice for protecting panoramic windows, garage spaces, and even bathrooms or shower rooms.
