Ajax FireProtect Plus - Wireless Fire Alarm (Heat, Smoke and CO)
Wireless smoke alarm that reacts to smoke and heat
- Alerts on smoke, rapid temperature rise or dangerous levels of carbon monoxide.
- Can operate standalone or with a hub.
- Built-in 85 dB siren.
- Can be controlled from your phone.
- Very easy to install.
If the fire alarm is triggered, you can receive a phone call while the siren sounds.
| Manual |
| Technical specifications | |
| Product type | Wireless fire detector with heat, smoke, and CO sensors with replaceable batteries |
| Compatibility | Compatible with Ajax hubs and radio signal range extenders Can operate independently from an Ajax hub using the built-in siren |
| Communication technology | Jeweller proprietary wireless technology Two-way communication Block encryption with dynamic key Frequency hopping against radio interference and jamming |
| 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 Depends on sales region |
| Radio communication range | Up to 1300 m in open space |
| Maximum effective radiated power | Up to 20 mW |
| Radio signal modulation | GFSK |
| Sensitive elements | Smoke sensor Heat sensor CO sensor |
| Smoke detection | Photoelectric sensor Detects smoke in the smoke chamber |
| False alarm prevention | HazeFlow software algorithm The system ignores the first smoke triggering and raises an alarm if smoke is detected again after 30 seconds during the second check |
| Heat detection | Thermistor High temperature alarm above 60 °C Temperature spike alarm when temperature rises more than 30 °C in 30 minutes or less |
| Carbon monoxide detection | Chemical CO sensor Detects dangerous carbon monoxide levels |
| CO alarm thresholds | 30 ppm, in 120 minutes or more 50 ppm, in 60–89 minutes 100 ppm, in 10–39 minutes 300 ppm, in 3 minutes Stops notifying when CO concentration drops to 40 ppm within 1 minute |
| Sensor service life | 7 years After 7 years of operation, the detector must be replaced |
| Built-in siren | 85 dB at a distance of 3 m Sound notification of alarms Active until the alarm reason is eliminated or notification is disabled |
| Interconnected fire alarm | All fire detectors in the system can activate built-in sirens if one detector registers an alarm Interconnected fire alarm activates within one hub-detector polling interval |
| Indication | LED indication Sound indication Shows detector status and alarms |
| Front panel touch button | Starts smoke chamber test in normal mode Turns off detector sound notification during alarm or malfunction |
| Self-test | Independently tests the smoke chamber Notifies when cleaning is required |
| Installation recommendations | Designed for indoor use only Mounted on SmartBracket mounting panel Pairing with the system via QR code |
| Sabotage protection | Tamper alarm on removal from surface or mounting panel Device authentication against spoofing |
| Communication loss detection | After 36 seconds Detection time depends on Jeweller or Jeweller/Fibra settings |
| Power supply | 2 × CR2 batteries Pre-installed main power supply 1 × CR2032 backup battery Pre-installed backup power supply |
| Battery life | Up to 4 years on main batteries |
| Operating temperature | From 0 °C to +65 °C |
| Operating humidity | Up to 80% |
| Protection class | IP40 |
| Dimensions | 132 × 132 × 31 mm |
| Weight | 220 g |
| Colours | Black White |
| Package contents | FireProtect Plus Jeweller SmartBracket mounting panel Installation kit 2 × CR2 batteries CR2032 backup battery Quick start guide |
| Warranty | 24 months |
| Reservations are made for possible errors and changes in the specifications | |
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Here you can see the compatibility between the various units and Hubs from Ajax
https://ajax.systems/tools/devices-compatibility/
Ajax FireProtect Plus smoke detector
FireProtect Plus is a wireless fire detector that senses smoke, temperature rises and dangerous levels of carbon monoxide (CO). If the alarm is triggered, it immediately sends a message to the hub and on to your phone via the app, SMS or a call.
Detects smoke
FireProtect monitors the air and reacts instantly if it detects smoke. It works by sending an invisible beam of light through a small chamber. If smoke particles get in, they disturb the light and trigger the alarm. It doesn't react to just anything — it's designed to distinguish real smoke from other things like dust or steam.
Responds to temperature changes
Besides smoke, it also responds to changes in temperature. That lets you get a warning even if there’s no visible smoke. If the temperature in a room suddenly rises significantly, or if it exceeds 60 °C, the alarm will activate automatically.
In some situations, a fire can develop very quickly without producing smoke at first — for example, an electrical fire. If the temperature rises by more than 30 °C within 30 minutes, it’s treated as a potential danger and the alarm will activate.
Detects dangerous levels of carbon monoxide (CO)
FireProtect Plus has a built-in CO sensor that detects dangerous levels of carbon monoxide, also known as the “invisible killer.”
CO levels are measured continuously, and the alarm triggers at the following concentrations:
- 30 ppm (0.003%) – if the level persists for 120 minutes or more
- 50 ppm (0.005%) – if the level persists for 60–89 minutes
- 100 ppm (0.01%) – if the level persists for 10–39 minutes
- 300 ppm (0.03%) – if the level persists for 3 minutes
If the CO concentration falls below 40 ppm (0.004%), the alarm will deactivate automatically.
Optical sensor
It uses an algorithm called HazeFlow that distinguishes between smoke and other particles.
Initial detection: The sensor detects particles in the air and starts an internal check.
Verification: Instead of triggering an alarm immediately, the detector waits 30 seconds and checks whether smoke is still present. If the particles dissipate quickly, the alert is ignored — for example, if it was just steam from a boiling pot.
Confirmed fire hazard: If smoke is still present after 30 seconds, the alarm sounds and you’ll be notified.
All smoke alarms trigger together
If one smoke detector is activated, all the other smoke detectors will also sound. You can also connect indoor and outdoor sirens so neighbours can hear if a smoke alarm goes off.
Easy to set up and configure
FireProtect Plus is simple to install: scan the QR code in the Ajax app, mount it on the ceiling, and configure the device directly in the app.
Range
FireProtect Plus has a hub range of up to 1,300 meters in open space.
Battery life
The sensor comes with 2 × CR2 main batteries and 1 × CR2032 backup battery with a lifetime of up to 4 years. Actual life depends on several factors:
- How much it’s used – frequent activations can affect battery life.
- Temperature – very cold environments can reduce battery performance.
- Battery quality – higher-quality batteries typically last longer than standard ones.
Tamper protection
If someone tries to remove the sensor, it sends a tamper alert to the hub.
Dimensions and weight
- Size: 132 × 132 × 31 mm.
- Weight: 220 g.
- Colors: White or black.
Which Hubs is it compatible with?
FireProtect Plus is compatible with all Ajax hubs, including:
- Hub
- Hub Plus
- Hub 2
- Hub 2 Plus
- ReX 2 signal repeater
Technical information
- Up to 1,300 m range (Line of Sight) in open terrain or across multiple floors.
- Can operate both standalone and with an Ajax hub – the alarm is triggered by the built-in siren even without a hub connection.
- Detects carbon monoxide (CO) and warns at dangerous levels.
- Device authentication to prevent fraud and tampering.
- Tamper protection – sends an alert if someone attempts to remove or tamper with the device.
- Two-way communication with the hub via the Jeweller protocol enables periodic tests and status updates.
- Built-in jamming detection and frequency hopping protect against signal interference.
- Encrypted radio communication for maximum security.
- Built-in 85 dB siren that activates on smoke, heat or CO danger.
- Interconnected alarm function – if one sensor detects fire or CO, all FireProtect devices in the system activate.
- Temperature detection – alarm triggers at temperatures above 60 °C or during rapid temperature rises.
- The CO sensor has a lifespan of up to 7 years, after which the device should be replaced.
- Battery life up to 4 years with 2 × CR2 main batteries and 1 × CR2032 backup battery.
- Easy mounting with SmartBracket so the sensor can be installed quickly without disassembly.
- LED indicator and test button for manual function testing.
