Ajax FireProtect Black Front View FR420B
Ajax FireProtect Black Front View FR420B
Ajax FireProtect Black 3-Way View FR420B
Ajax FireProtect Black Indoor Application View FR420B
Indoor Application View FR420B

Ajax FireProtect Black

R 1,809.00 Incl. VAT
R 0.00 Incl. VAT

Available to order online or collect at 6 Cosmic Street Linbro Park, Sandton, 2090 (Map)


Spec Data Sheet Button

The Ajax FireProtect Black is a wireless fire detector with a temperature sensor that monitors security in the room twenty-four hours a day and immediately notifies of smoke and sharp jumps in temperature.

The device detects smoke by means of a camera with photoelectric sensor. If no smoke is emitted, the additional detector registers temperature increases in the room.

Independently tests the smoke chamber and gives prompt notification of the need to dust.

Please note: FireProtect operates within the Ajax system, connected to the hub via the protected Jeweller protocol.

Compatible with All Ajax Hubs, Range Extenders, ocBridge Plus and uartBridge.

Product Code: 8188.10.BL1


  • Wireless sensor detects smoke and rising temperatures in a room without the smoke
  • Built-in battery (lasts up to 4 years)
  • Communication range of 1300m (in an open space/line of sight)
  • Can work autonomously using Ajax ocBridge Plus and Ajax uartBridge receivers and a smart Hub control panel
  • It can operate independently from the hub, emitting a fire alarm by means of a built-in siren(85Db). Several detectors indicate an alarm simultaneously.
  • Tamper-resistant
  • Detector is set up via the Ajax app for iOS, Android, macOS and Windows
  • System notifications delivered via push notifications, SMS and calls (if activated).
  • Quick and Easy installation



The Ajax FireProtect comes ready to operate straight out the box.

The battery is pre-installed, so there is no need to disassemble the detector.

With one click, it can be connected to the hub in the mobile application. It can be mounted on the SmartBracket in just a few minutes.


Compatibility All Ajax Hubs, Range Extenders, ocBridge Plus and uartBridge
Classification Radio channel smoke detector with temperature sensor and built-in siren
Type of detector Wireless
Installation method Indoors
Sensing element Photoelectric and temperature sensors
Activation threshold +59°С ±2°С
Type of notification Sound/light
Volume of built-in siren 85 dB
Alarm signal delivery time 0.15 s
False alarm filter Yes
Interconnected alarms Yes
Power supply 2 x CR2 batteries, 3V (Backup battery: CR2032)
Battery life Up to 4 years
Communication range with central unit Up to 1,300 m in an open space
Two-way communication between devices Yes
Operating frequencies 868.0-868.6 MHz
Self-adjusting RF output power Up to 20 mW
Block encryption based on AES algorithm Yes
Detector polling period 12−300 s
Additional temperature sensor Available
Operating temperature range From 0°С to +65°С
Permissible humidity Up to 80%
Protection against fraud Yes
Jamming detection Yes
Tamper-resistant Yes
Remote setting and testing Yes
Certification EN 14604
Product Dimensions 132 mm х 132 mm × 31 mm
Product Weight 220g
Packaging Dimensions 165 mm x 160 mm x 35 mm
Mass of unit packed 480g
Warranty 24 months limited Manufacturer’s warranty. The warranty does not cover batteries



1 x Ajax FireProtect Black








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