Ajax FireProtect 2 RB (Heat/Smoke/CO): smoke, heat and carbon monoxide in one detector
Detects smoke, heat and CO and sounds the alarm immediately with an 85 dB siren. The bispectral smoke chamber ignores steam and vapour and works wirelessly with replaceable batteries (up to 7 years). Interconnect several detectors so that they sound together; with an Ajax hub you also receive the notification on your phone.
The Ajax FireProtect 2 RB (Heat/Smoke/CO) is a wireless fire detector that you use on its own or connect to your Ajax system. A blue and an infrared LED in the patented chamber recognise real smoke and are not fooled by cooking vapour. The CO sensor monitors carbon monoxide, the gas you cannot smell or see, which is released by combustion appliances. Ajax states a battery life of up to 7 years for the 2x CR123A batteries; after that you replace them yourself.
Why the FireProtect 2
Bispectral smoke sensor
Bispectral optical smoke chamber with a blue and an infrared LED. It distinguishes real smoke from steam and cooking fumes, so you get fewer false alarms.
Fast heat detection
Two thermistors trigger an alarm when the temperature rises above 64 °C, and also when it rises by 10 °C within one minute, regardless of how warm it is at that point. This means the detector also responds to fires that produce hardly any smoke.
CO sensor for carbon monoxide
Electrochemical carbon monoxide sensor with a service life of 10 years. You cannot smell or see CO, but this detector can.
Built-in 85 dB siren
Each detector has its own siren (85 dB at 3 m). In the event of an alarm you hear it immediately, including at the location of the detector.
Replaceable battery (RB)
Ajax states up to 7 years for the two CR123A batteries. This is an upper limit under ideal conditions; in practice it may be shorter. You replace them yourself and the detector then simply continues to work.
Wireless via Jeweller
Wireless connection via Jeweller (866-868 MHz, frequency hopping, up to 1700 m in open field). Links with other detectors and, with an Ajax hub, with the Ajax app.
Standalone or linked
Works standalone with its own siren. Link several detectors so that they sound the alarm together, and add an Ajax hub for notifications in the app and to the alarm receiving centre.
Mounted in 90 seconds
Click the detector onto the SmartBracket without opening the housing. The tamper contact reports opening or removal.
The FireProtect 2 RB (Heat/Smoke/CO) in pictures
The detector in white and in black, small and flat when mounted on the SmartBracket.
Quick to install
Click the detector onto the supplied SmartBracket. This takes about 90 seconds and does not require opening the housing. A tamper contact warns you as soon as someone opens or detaches the detector. If you use an Ajax hub, add the detector in the Ajax app by scanning the QR code.
Technical specifications
| Detection | |
| Detector type | Wireless fire detector, dual-spectrum smoke sensor + heat sensor + CO sensor |
| Smoke detection | Bispectral optical (blue + infrared) |
| Heat detection | Thermistors, alarm above 64 °C or on a rise of 10 °C within a minute |
| CO detection | Electrochemical, sensor lifespan 10 years |
| Siren | 85 dB at 3 metres |
| Power supply | |
| Power supply | 2x CR123A battery (replaceable) |
| Battery life | Up to 7 years according to Ajax, no minimum (2x CR123A, replaceable by the user) |
| Connection | |
| Wireless | Jeweller, 866-868 MHz with frequency hopping, up to 1700 m in open terrain |
| Operation | Standalone or interconnected; with an Ajax hub also app and alarm receiving centre |
| App and alarm receiving centre | Via an Ajax hub: Ajax Security System (iOS and Android), notification within 20 s |
| Housing | |
| Mounting | SmartBracket, within 90 seconds without opening the housing |
| Dimensions | 124 x 124 x 45 mm |
| Weight | 274.5 g |
| Operating temperature | 0 to +50 °C |
| Colour | White or black |
| Certification | EN 14604:2005, EN 50291-1:2018 |
Specifications as stated by Ajax Systems. We do our utmost to keep the information on this page accurate and up to date, but a manufacturer may modify a model in the meantime and a typing error can never be entirely ruled out, so no rights can be derived from this information. In case of doubt, the Ajax Systems manual is leading; it contains all specifications. Do you see an error, are you missing something or are you unsure whether a feature is right for your situation? Let us know or ask before you order: we will look into it, update the page and thank you for it. If a product does not match what is stated here, we will put it right.
All FireProtect 2 detectors at a glance
The FireProtect 2 range differs in three respects: which hazards the detector senses (smoke, heat, carbon monoxide), the power supply (replaceable battery, sealed battery or 230 V mains power) and, as a result, the dimensions. All versions are shown side by side below.
| Model | Smoke | Heat | CO | Power supply | Battery life | Dimensions |
|---|---|---|---|---|---|---|
| FireProtect 2 (CO) | No | No | Yes | Choice: RB, SB or AC | Up to 10 years, your choice | RB/SB 86 x 86 x 44 mm, AC 122 x 122 x 54 mm |
| FireProtect 2 (Heat) | No | Yes | No | Choice: RB, SB or AC | Up to 10 years, your choice | RB/SB 86 x 86 x 44 mm, AC 122 x 122 x 54 mm |
| FireProtect 2 (Heat/CO) | No | Yes | Yes | Choice: RB, SB or AC | Up to 10 years, your choice | RB/SB 86 x 86 x 44 mm, AC 122 x 122 x 54 mm |
| FireProtect 2 RB (Heat/Smoke) | Yes | Yes | No | Replaceable battery (RB) | Up to 7 years, replaceable | 124 x 124 x 45 mm |
| FireProtect 2 RB (Heat/Smoke/CO) | Yes | Yes | Yes | Replaceable battery (RB) | Up to 7 years, replaceable | 124 x 124 x 45 mm |
| FireProtect 2 SB (Heat/Smoke) | Yes | Yes | No | Sealed battery (SB) | Up to 10 years, sealed | 124 x 124 x 45 mm |
| FireProtect 2 SB (Heat/Smoke/CO) | Yes | Yes | Yes | Sealed battery (SB) | Up to 10 years, sealed | 124 x 124 x 45 mm |
| FireProtect 2 AC (Heat/Smoke) | Yes | Yes | No | 230 V mains power (AC) | Mains power + backup | 122 x 122 x 54 mm |
| FireProtect 2 AC (Heat/Smoke/CO) | Yes | Yes | Yes | 230 V mains power (AC) | Mains power + backup | 122 x 122 x 54 mm |
Dimensions: there are three housings. With a battery-powered smoke sensor it measures 124 x 124 x 45 mm; without a smoke sensor (Heat, CO, Heat/CO) the detector is considerably smaller at 86 x 86 x 44 mm. Every AC version measures 122 x 122 x 54 mm, because the mains connection is inside the housing. If you replace a battery-powered detector with an AC version, allow for this difference.
Battery life is a figure stated by Ajax under ideal conditions, not a guarantee and not a minimum. How long a battery lasts for you depends on the temperature at the mounting location, the signal strength to the hub, the number of alerts and tests, and the battery itself. You should therefore expect that it may be shorter. The detector and the app warn you when the battery is low. With the RB, you replace the batteries yourself and the detector keeps working; with the SB and AC, the sealed battery cannot be replaced and you replace the whole detector at that point. For smoke detectors, the general advice is in any case to replace them after 10 years at the latest.
You can see prices and stock levels on each product page. The versions without a smoke sensor (Heat, CO, Heat/CO) are intended for rooms where an ordinary smoke detector would cause false alarms, such as a kitchen, boiler room or garage.
Which FireProtect 2 should you choose?
First decide what you want to detect in each room, then choose the power supply that suits the location.
Living room, bedroom, hallway
Here, smoke is the first sign of fire. Choose a Heat/Smoke version, or Heat/Smoke/CO if a combustion appliance is also nearby.
Kitchen, bathroom, boiler room
Steam and vapour cause false alarms with a smoke detector. The Heat version responds to heat only.
Boiler room, garage, near the open fireplace
Wherever a fuel is burned, carbon monoxide is produced. Choose CO or Heat/CO.
Replaceable battery (RB)
Battery you can replace yourself (2x CR123A, up to 7 years according to Ajax). The most frequently chosen version for the home.
Sealed battery (SB)
Built-in battery, up to 10 years according to Ajax. No maintenance required; afterwards you replace the whole detector.
230 V mains power (AC)
Permanently connected to the mains with sealed backup. For new builds or projects where cabling is mandatory. Every AC version measures 122 x 122 x 54 mm, regardless of the sensor set: for the smoke detectors it is 9 mm thicker, for the versions without a smoke sensor considerably larger. Conceal the cable with the CableTrunk.
Need a larger or EN 54-certified fire detection installation (office, hospitality, school)? Take a look at the Ajax EN54 Line.
Frequently asked questions
Do I need an Ajax hub for this?
Not necessarily. The detectors also work standalone: each detector has its own 85 dB siren and you can interconnect several detectors so that they raise the alarm together. If you want notifications on your phone via the Ajax app or signalling to an alarm receiving centre, you need an Ajax hub. We recommend at least a Hub 2: installation and configuration are simpler and you receive the notifications neatly in the app.
Does it raise a false alarm because of cooking fumes or steam?
Less quickly than a standard smoke detector. The bispectral smoke chamber (blue plus infrared) distinguishes real smoke particles from steam and vapour. For a kitchen or bathroom, a Heat version without a smoke sensor remains the safest choice.
What exactly does the CO sensor do?
It measures carbon monoxide, a gas you cannot smell or see, which is released by incomplete combustion (central heating boiler, stove, open fire). The CO sensor lasts 10 years; after that you replace the detector.
How long does the battery last?
Ajax states up to 7 years for the 2x CR123A. You replace them yourself. That figure is an upper limit that Ajax measures under ideal conditions, not a minimum and not a guarantee: temperature, signal strength to the hub and the number of alerts and tests make it shorter in practice. The detector and the app warn you when the battery is low, so you will not be caught by surprise.
How large is this detector?
The detector measures 124 x 124 x 45 mm. If you later opt for the AC version with mains power, it measures 122 x 122 x 54 mm.
Does it also warn the other detectors in the house?
Yes. You can interconnect several detectors, so that the alarm from one detector sets off the sirens of all the others. This also works without a hub. With an Ajax hub, you also receive a notification in the app within 20 seconds.
Is this a certified fire detector?
Yes. The smoke version complies with EN 14604 and the CO function with EN 50291-1:2018. For EN 54-certified installations, use the Ajax EN54 Line.
In the box
Ajax FireProtect 2 RB (Heat/Smoke/CO)
The fire detector itself, in white or black.
SmartBracket
Mounting plate for ceiling or wall.
Batteries
2x CR123A pre-installed
Mounting materials
Screws and wall plugs.
Documentation
Quick start guide and safety information.
Raymond van Asseldonk (verified owner) –
Works well
Bas Sollie (verified owner) –
Easy to install
Ellen Van Hoepen (verified owner) –
Nice product, easy installation