Ajax Curtain Outdoor - Wireless outdoor curtain detector

Ajax outdoor curtain detector

Curtain Outdoor Jeweller is designed to create a narrow, precise and targeted security zone around a building or area. Instead of monitoring a wide field, the detector only registers movement in a thin line, making it suitable for passages, driveways, narrow sides of buildings and confined spaces. By combining two PIR sensors, a microwave radar and Ajax’s advanced software, the device achieves stable operation in environments where wind, animals, vegetation and lighting conditions normally cause problems for standard motion detectors.

Two PIR sensors combined with microwave radar

The detector uses two PIR elements that detect changes in heat and movement, but in outdoor environments such signals can be affected by sun-warmed surfaces, reflections or temperature fluctuations. Therefore the PIR sensors are supplemented with a 24 GHz K-band microwave transmitter that actively measures movement in the area using the Doppler effect. The microwave can distinguish between real movement and temporary disturbances, which significantly increases stability. This combined method makes the detector better suited for outdoor use than pure PIR solutions.

Adjustable range of 8–12 meters

The range can be set directly on the unit via a physical slider. This lets you tailor the monitored field precisely to the task at hand. If the detector should cover a narrow access path, the range can be reduced to avoid detection further out. For larger areas, for example along a fence or a building, the range can be extended to the full area up to 12 meters. This flexibility allows precise perimeter protection without affecting nearby areas.

Narrow 8° detection angle

The detector covers only a very narrow field of about 8° horizontally. That creates a “detection wall” that only reacts if a person passes through this slim area. This is a big advantage in environments where wider sensors would cause too many unnecessary triggers — e.g., along facades where passersby or incidental movements should not be registered, or in carports and passages where you want focus on a specific direction of movement.

Pet-immune up to about 100 cm height

If the detector is mounted at 1 meter height and set to Pet-mode, it ignores movements close to the ground — for example from dogs, cats and other animals up to about 100 cm tall. This reduces the risk of false alarms in gardens or areas frequented by animals. Pet-mode also adjusts the detector’s internal algorithm so it focuses more on human walking height rather than lower movements.

AI-based SmartDetect to reduce false alarms

SmartDetect analyses movements in multiple stages, assessing size, speed and movement patterns. The system actively tries to distinguish between people, animals, leaves, snow, branches in the wind and other types of signals that can cause issues for traditional outdoor sensors. The software adapts dynamically to the surroundings and helps maintain accuracy even in changing weather and light conditions.

Temperature compensation for stable operation

As temperatures fluctuate, PIR sensors’ sensitivity naturally changes. Curtain Outdoor therefore continuously compensates for temperature changes so detection remains stable from −25°C to +60°C. This means the detector can be used year-round without losing sensitivity in extreme heat or cold.

Advanced anti-masking

The anti-masking system constantly monitors the detector’s front. If someone tries to block the view by covering the lens with tape, spray, fabric or other materials, the system detects the change and sends an alarm. This is important in outdoor installations where an intruder might try to “neutralize” the sensor before approaching the building.

Tamper protection and accelerometer

The tamper switch detects if someone tries to remove the detector from its SmartBracket. Additionally, the unit includes an accelerometer that can register movements, shocks or attempts to loosen the sensor without opening the enclosure. This increases security in installations in exposed areas where sabotage attempts may occur.

Long wireless range — up to 1,700 meters

Curtain Outdoor communicates via Ajax’s Jeweller radio, which is optimized for low power consumption and long range. With up to 1,700 meters of communication distance in open terrain, the detector can be used on large properties, at outbuildings, around fences or in commercial areas with wide physical spread. The system automatically adjusts transmit power so the batteries last longer.

Frequency hopping and encrypted communication

To protect against interference and jamming, the detector automatically switches between multiple frequency channels. All data is sent with block encryption and a dynamic key, making it difficult for unauthorized parties to intercept or disrupt communication with the hub.

Battery operation up to approx. 3 years

Curtain Outdoor is powered by two CR123A batteries, which are included. The low power consumption and periodic data transmissions make it possible to operate for up to approximately three years, depending on environment and activity. When the battery is running low, the system notifies both users and installers.

IP55

The detector is rated IP55 and built to withstand rain, dust and moisture. The included hood protects the anti-masking sensors from rain and snow so the function continues to work in poor weather. This makes it suitable for installation on facades, in driveways and other outdoor locations with direct exposure.

Flexible mounting options

The detector can be mounted directly on a wall, in corners or using the included bracket, depending on the desired monitoring direction. Mounting height can vary between 1 and 2.4 meters depending on the intended function, and the installation can be adapted for private homes, businesses and outdoor passage areas.

Key technical points

• PIR sensors: 2 pcs
• Microwave sensor: 24 GHz K-band
• Detection distance: 8–12 meters
• Detection angle: 8° horizontal / 85°–75° vertical
• Sensitivity: 3 levels
• Pet immunity: animals up to approx. 100 cm height
• Communication range: up to 1,700 meters
• Radio technologies: Jeweller + Wings
• Encryption: block encryption with dynamic key
• Frequency hopping: yes
• Operating temperature: −25°C to +60°C
• Battery: 2 × CR123A
• Battery life: up to approx. 3 years
• Protection rating: IP55
• Anti-masking: yes
• Tamper switch + accelerometer: yes
• Dimensions: up to 155 × 77 × 85 mm
• Weight: 223–299 g (depending on hood/bracket)