The 2012/24AUSI is designed to provide early warning of developing fires for occupants of residential and commercial buildings. The 2012/24AUSI is a photoelectric smoke alarm that is designed for open area protection.
Its compact design makes it attractive to look at and easy to install. The 2012/24AUSI photoelectric smoke-alarms are designed to
respond to a broad range of fires while providing maximum stability.
The low-voltage wiring make them ideal for applications such as apartment buildings and nursing homes. Designed for use as open
area protection up to 24 units may be interconnected.
These multi-voltage, 4 wire smoke alarms can be connected to many third-party devices such as security alarm systems and access control systems. The 2012/24AUSI is supplied complete with mounting ring and 9VDC back-up battery.
• Low profile design in ceiling white housing
• CSIRO certified and listed to AS3786:2014
• 85dB(A) at 3 meters
• 9-24 volt DC operation
• On-board 9 volt back-up battery
• NO/NC change-over alarm relay contacts
• 8 second alarm verification feature Audible emergency evacuation signal (ISO 8201)
• Custom dual-mode alarm relay, interconnect feature
• Automatic diagnostic test feature
• Custom ‘easy-clean’ chamber
• ‘HUSH’ / Test Push Button feature
• Interconnect up to 24 smoke alarms
• Temporal Horn Pattern
• Green and Red Bi-color LED Indication
• Visual and Audible indication of low battery and other fault
conditions
The System Sensor 2012/24AUSI is a professional-grade photoelectric smoke alarm with built-in sounder, designed for residential, commercial and multi-occupancy applications where reliable smoke detection and system integration are required.
Unlike basic standalone smoke alarms, the 2012/24AUSI is a low-voltage 12/24V DC smoke alarm with relay output, 9V battery backup and the ability to interconnect multiple units. This makes it suitable for integration with security alarm panels, access control systems, nurse call systems, building management systems and other third-party monitoring equipment.
It is commonly used in apartments, rooming houses, aged care facilities, nursing homes, supported accommodation, offices, clinics and commercial buildings where a connected smoke alarm solution is preferred over a simple domestic battery-only alarm.
The 2012/24AUSI is listed to Australian smoke alarm standards and features a built-in 85dB sounder at 3 metres, 10–30V DC operation, replaceable 9V backup battery and wired interconnection for up to 24 devices.
Why Choose the System Sensor 2012/24AUSI?
The 2012/24AUSI is often selected by installers because it combines three important features in one device: photoelectric smoke detection, local audible warning, and relay output for system connection.
This means the detector can sound locally while also triggering a connected alarm system, dialler, access control input or other monitoring device. For many commercial and semi-commercial installations, that makes it far more useful than a standard retail smoke alarm.
Key advantages include:
- Photoelectric smoke sensing for early warning of developing fires
- Built-in sounder rated at 85dB at 3 metres
- 12V / 24V DC operation for connection to low-voltage systems
- 9V backup battery for standby protection
- Relay output for connection to security and access control systems
- Interconnectable design for multiple smoke alarms
- Low-profile ceiling white housing for neat installation
- Suitable for residential and commercial open-area protection
- Commonly used by security, fire and electrical installers
Ideal Applications
The System Sensor 2012/24AUSI is a good choice where smoke alarms need to be connected into a broader building or security system.
Common applications include:
- Apartment buildings
- Nursing homes and aged care facilities
- Rooming houses and boarding houses
- Medical clinics and consulting rooms
- Offices and commercial tenancies
- Supported living accommodation
- Security alarm smoke detection
- Access control system integration
- Plant rooms, corridors and common areas
- Residential properties requiring relay output smoke alarms
The low-voltage design makes this model particularly useful when smoke alarms need to be connected back to an alarm panel or other control equipment.
Photoelectric Smoke Detection
The 2012/24AUSI uses photoelectric smoke detection, which is designed to detect visible smoke particles created by many developing fires. Photoelectric alarms are commonly used for general open-area protection and are widely preferred in many modern smoke alarm applications.
Photoelectric smoke alarms are especially useful where early warning of smouldering or slow-developing fires is important. This makes them suitable for bedrooms, hallways, living areas, shared accommodation spaces, common corridors and commercial rooms.
Built-In 85dB Sounder
This smoke alarm includes an onboard sounder, so it can provide a local audible warning when smoke is detected. The sounder is rated at 85dB at 3 metres, giving occupants a clear warning signal in the protected area.
This is useful in applications where the detector is not just being used as a silent input to an alarm panel, but also needs to alert people nearby.
Relay Output for Alarm Panel Integration
One of the major benefits of the System Sensor 2012/24AUSI is its relay output. The detector includes 1 Form C relay contacts, allowing it to be connected to many third-party systems, including:
- Bosch alarm panels
- DSC alarm panels
- Inner Range systems
- Tecom systems
- Ness alarm panels
- Access control controllers
- Nurse call systems
- Building management systems
- Monitoring inputs and diallers
This makes it a practical option for installers who need a smoke alarm that can trigger an external system, rather than simply sounding on its own.
12V / 24V DC Operation
The 2012/24AUSI operates from a low-voltage DC supply, with a stated supply voltage range of 10V DC to 30V DC. This allows it to be used with many 12V and 24V security, fire-adjacent and control systems.
This flexibility is one reason the 2012/24AUSI is popular with alarm installers and integrators.
9V Battery Backup
The unit includes a replaceable 9V backup battery, providing standby power if the external supply is interrupted. This is important for applications where continued local smoke alarm operation is required even during a power or system supply issue.
Interconnectable Smoke Alarm Design
For larger sites, multiple 2012/24AUSI smoke alarms can be interconnected. The model is designed for open-area protection and supports interconnection of up to 24 smoke alarms, depending on the installation design and wiring requirements.
This makes it suitable for multi-room or multi-area installations where more than one detector is needed.
Installation Notes
The System Sensor 2012/24AUSI should be installed by a suitably qualified installer in accordance with the manufacturer’s instructions, relevant Australian Standards and local building requirements.
Because this is a 4-wire low-voltage smoke alarm, it is not installed the same way as a basic 240V domestic smoke alarm. It is typically wired to a suitable 12V or 24V DC power supply and, where required, connected to an alarm panel or monitoring input using the relay contacts.
Before purchasing, confirm that this model suits the system you are connecting it to.
Suggested Use Cases
Security Alarm Smoke Detection
The 2012/24AUSI is commonly used when a smoke alarm needs to trigger a security alarm panel. The relay output can be wired to a zone input, allowing the alarm system to report or respond to a smoke detection event.
Apartment and Multi-Occupancy Buildings
Its low-profile design, sounder, battery backup and interconnection capability make it suitable for apartment-style and shared accommodation environments where multiple alarms may be required.
Nursing Homes and Care Facilities
The model is often used in care environments because it can provide local audible warning while also being connected to other monitoring or control systems.
Rooming Houses and Supported Accommodation
For properties where smoke alarms form part of a broader compliance and safety setup, the 2012/24AUSI provides more integration flexibility than a basic standalone alarm.
Key Specifications
| Feature |
Specification |
| Model |
2012/24AUSI |
| Detection Type |
Photoelectric smoke alarm |
| Supply Voltage |
10V DC to 30V DC |
| Sounder Output |
85dB at 3 metres |
| Relay Output |
1 Form C relay |
| Relay Rating |
1A at 30V DC or AC |
| Backup Battery |
9V DC battery |
| Interconnection |
Up to 24 units |
| Size |
55mm H x 135mm diameter |
| Weight |
Approx. 220g |
| Operating Temperature |
0°C to 50°C, depending on referenced specification |
| Typical Use |
Open-area smoke detection, alarm integration, commercial/residential applications |
Frequently Asked Questions
Is the System Sensor 2012/24AUSI a photoelectric smoke alarm?
Yes. The 2012/24AUSI is a photoelectric smoke alarm designed for open-area protection in residential and commercial buildings.
Does the 2012/24AUSI have a built-in sounder?
Yes. It includes an onboard sounder rated at 85dB at 3 metres, allowing it to provide a local audible warning when smoke is detected.
Can this smoke alarm connect to a security alarm system?
Yes. The 2012/24AUSI includes relay contacts, making it suitable for connection to many alarm panels and third-party systems. Compatibility depends on the alarm panel, wiring method and installer configuration.
Is this a 240V smoke alarm?
No. This is a low-voltage 12/24V DC smoke alarm, with a supply voltage range of 10V DC to 30V DC. It is not a standard 240V household smoke alarm.
Does it have battery backup?
Yes. The 2012/24AUSI includes a replaceable 9V backup battery.
Can multiple 2012/24AUSI smoke alarms be interconnected?
Yes. The unit is designed to support interconnection of up to 24 devices, subject to correct installation and wiring.
Is this suitable for apartments and nursing homes?
Yes. The 2012/24AUSI is commonly used in apartments, nursing homes, aged care, supported accommodation, rooming houses and other low-voltage smoke alarm applications.
Can I install this myself?
This product should be installed by a suitably qualified technician, electrician, fire contractor or security installer. Correct wiring, power supply, relay configuration and compliance requirements need to be considered.
What is the difference between this and a normal smoke alarm?
A normal household smoke alarm is usually a standalone battery or 240V unit. The 2012/24AUSI is a low-voltage, relay-output smoke alarm designed for system integration, making it more suitable for alarm panels, access control systems and commercial-style installations.
