Tech specs

FireProtect 2 SB (Heat/Smoke) Jeweller

Wireless combined heat and smoke detector with sealed batteries

FireProtect 2 SB (Heat/Smoke) Jeweller

Devices compatibility


Jeweller communication technology

Proprietary wireless technology for transmission of alarms and events.


  • Two-way communication.
  • Protection against device spoofing.
  • Block encryption featuring a floating key.
  • Instant notifications.
  • Remote configuration via the Ajax apps.

Radio 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 the region of sale.

Maximum effective radiated power (ERP)

up to 20 mW

Automatic power control to reduce power consumption and radio interference.

Radio signal modulation


Radio communication range

up to 5,500 ft

Between the detector and a hub (or radio signal range extender) in an open space.

Encryption of radio communication

All the data stored and transmitted are protected by block encryption with a floating key.

Radio frequency hopping

To prevent radio interference and jamming.

Sensitive elements

smoke sensor

heat sensor

Smoke detection

Sensitive element

double-spectrum optical sensor

Recognizes smoke by the size of particles in the air.

Protection from false alarms

Does not react to water vapor.

Patented smoke chamber

Protects the smoke sensor from dust, dirt, and insects.

Dangerous temperature detection

Sensitive element

according to the requirements for Class A1R heat detectors

Requirements of EN 54-5 and BS 5446-2 standards.

High temperature alarm

at temperatures above 147°F

Temperature spike alarm

when the temperature rises more than 50°F in 1 minute or less

Additional features

In-built siren

volume 85 dB at a distance of 9 ft

Sound notification of alarms. Active until the reason for triggering is eliminated or until the user disables notification.

Interconnected Fire Detectors Alarms

All fire detectors in the system turn on built-in sirens if at least one of the detectors registers an alarm. An interconnected fire alarm is activated during one “hub — detector” polling interval but no more than 20 seconds later.

LED indication

green is a power indication

A LED indicator on the device enclosure lights up once every 56 seconds. The indication meets the requirements of EN 50291.

yellow is an indication of malfunctions

A LED indicator on the device enclosure lights up when malfunctions are detected. For example, in the case of discharged batteries, contamination of the smoke chamber, or end of the service life.

red is an indication of fire alarms

A LED indicator on the device enclosure lights up when the detector registers a fire alarm.

Button on the front panel of the detector

In normal mode, when pressed, it starts the smoke chamber test. In the event of an alarm or malfunction, the pressing turns off the detector sound notification.


The device is designed only for indoor installation. SmartBracket mounting panel allows adjusting the position of the detector after installation.

Anti-sabotage protection

Tampering alarm

Alerts of attempts to detach the detector from the surface or remove the mounting panel.

Protection against spoofing

device authentication

Detection of communication failure

within 15 minutes

The time to detect communication loss depends on the settings for the number of undelivered data packages (specified in the Jeweller or Jeweller/Fibra settings). The polling interval is fixed at 300 seconds.

Power supply

For FireProtect 2 SB (Heat/Smoke)

2 non-replaceable lithium batteries

10 years of battery life.



4.88″ × 4.88″ × 1.77″


9.47 oz

Operating temperature range

from 32°F to 122°F

Operating humidity

up to 80%

Protection class





Complete set

FireProtect 2 SB (Heat/Smoke) Jeweller

SmartBracket mounting panel

Installation kit

Quick Start Guide

Additional information

Compliance with standards

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24 months

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User manual

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