- Frequency Jeweller
DoorProtect Jeweller Wireless Opening Detector with Reed Switch, Black
SKU AJ-42797
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- 30-day returns on unopened products
A reed-switch opening detector for doors, windows and skylights, running up to seven years on the battery it ships with. The reed switch is British-made and rated past two million openings, which on a door that gets used forty times a day is the difference between a detector that lasts and one you revisit.
Built for the installer
Two magnets come in the box, a big one and a small one. The small magnet works up to 0.4 inches from the detector and the big one up to 0.8 inches, which covers narrow uPVC frames as well as deep timber reveals without hunting for a spacer. Fit one or the other, never both, and put it to the right of the detector as the arrow on the enclosure shows.
Contact chatter protection ignores vibration lasting under 0.15 seconds, so a door rattling in a draught does not generate an alarm. There is also a terminal input for a third-party wired detector with an NC contact, which lets one wireless point cover a hardwired device that would otherwise need its own transmitter.
Key features
- Up to 7 years on the pre-installed CR123A, so it is not a service item in any normal cycle
- Two magnet sizes included covering narrow frames and deep reveals without shimming
- Contact chatter protection ignores vibration under 0.15 s, which stops draught rattle alarms
- NC terminal input to bring a third-party wired detector onto the system through this device
- Chime function sounds the siren on opening while the system is disarmed
System requirements
Requires an Ajax hub or range extender. Indoor use only. Do not fit both magnets at once, and mount the magnet to the right of the detector.
Specifications
| SKU | AJ-42797 |
|---|---|
| Brand | AJAX |
| Radio communication range | Up to 3,900 ft in open space, between the device and a hub or range extender |
| Sensitive element | 1 reed switch |
| Magnets supplied | Big magnet works up to 0.8 in, small magnet up to 0.4 in |
| Chatter protection | Ignores vibration lasting up to 0.15 s |
| Additional input | Wired detector with normally closed (NC) contact |
| Sabotage protection | Tamper alarm on enclosure opening or removal from the mounting panel |
| Use environment | Indoor use only |
| Power input | 1 x CR123A, pre-installed |
| Battery life | Up to 7 years |
| Dimensions | 3.54 x 0.79 x 0.79 in |
| Device weight | 1.02 oz |
| Operating temp | 14F to 104F. UL/ULC certified 32F to 120F |
| Operating humidity | Up to 75%. UL/ULC certified to 85% |
| Protection class | IP50 |
| Colour | Black |
| Region | 9NA, North America model |
| Radio protocol | Jeweller, two-way encrypted wireless |
| Frequency band (North America) | 905.0-926.5 MHz, certified to UL/ULC standards |
| Radio modulation | GFSK with frequency hopping |
| Encryption | Block encryption with a dynamic key |
| Communication loss detection | After 36 seconds |
| Anti-spoofing | Device authentication |
| Warranty | 24 months |
| Frequency | Jeweller |
