The AJAX DoorProtect Jeweller is a wireless opening (magnetic contact) detector intended for indoor door/window monitoring. It detects when a door or window opens via a reed switch and can also accept a wired NC external sensor.
Power & Battery
• Battery Life: Up to 7 years (1 × CR123A, pre-installed)
• Operating Voltage: ~3 V nominal
• Quiescent Current Consumption: ~17.5 µA
• Maximum Current: ~21.4 mA
📡 Communication
• Protocol: Jeweller (two-way, encrypted)
• Range: Up to ~3,900 ft open space between detector and hub or range extender
• Communication Loss Detection: after ~36 seconds
• Radio Characteristics:
– Frequency bands: 866.0–866.5 MHz; 868.0–868.6 MHz; 868.7–869.2 MHz; 905.0–926.5 MHz; 915.85–926.5 MHz; 921.0–922.0 MHz (varies by region)
– Maximum ERP: up to 20 mW
– Modulation: GFSK
– Frequency hopping to reduce interference & jamming
🔎 Detection
• Sensor: 1 reed switch (magnetic contact)
• Magnets: Comes with small and big magnets
– Small magnet: effective up to ~1 cm
– Big magnet: effective up to ~2 cm
• Reed Switch Stabilization: Detector ignores vibrations lasting ≤ 0.15 s
• External Input: Terminal to connect a third-party wired NC (normally closed) detector
• Chime Mode: When system is disarmed, opening detector triggers a special sound via siren to indicate door/window opening
🛡️ Security Features
• Tamper Alarm: Alerts if detector is detached from surface or removed from mounting plate
• Protection Against Spoofing / Forgery: Device authentication, encrypted communication, anti-jamming measures
• Detection of Communication Loss: ~36 seconds
🌐 Environmental & Physical
• Indoor Use Only
• Protection Class: IP50
• Operating Temperature: –10°C to +40°C (14°F to 104°F)
• Humidity: up to 75% (some specs up to 85%)
• Dimensions (Detector): ~90 × 20 mm (3.54″ × 0.79″ × 0.79″)
• Magnets’ Dimensions:
– Big magnet: same as detector
– Small magnet: ~55 × 11 × 6 mm (2.16″ × 0.43″ × 0.24″)
• Weight: ~29 g (1.02 oz)
📦 Package
• Includes: Detector, SmartBracket mounting panel, small and big magnets, CR123A battery (pre-installed), installation kit, external contact terminals, quick start guide