Always On. Always Watching.
Reliable alarm systems that protect your home or business around the clock. From basic perimeter alarms to fully monitored smart systems with instant mobile alerts — we have the right solution for every property.
Ajax Wireless Alarm Systems — Our Preferred Choice for Domestic Installations
As an authorised Ajax partner, OnSecurity recommends and installs Ajax wireless alarm systems as our preferred solution for residential properties. Ajax is a world-leading security platform trusted in over 130 countries — and for good reason.
Ajax systems are 100% wireless, meaning no drilling through walls or running cables throughout your home. Installation is fast, clean, and minimally disruptive — yet the system delivers professional-grade protection with encrypted two-way communication and tamper detection on every device.
Control and monitor your system from anywhere using the Ajax app. Arm, disarm, check sensor status, and receive instant alerts — all from your smartphone. Ajax integrates seamlessly with professional monitoring centres for 24/7 response when you need it most.
- 100% wireless — no cabling, no mess
- Military-grade encrypted communication
- Up to 7 years battery life on sensors
- Tamper-proof housing on all devices
- Full control via the Ajax smartphone app
- Compatible with professional monitoring centres
- Expandable — add devices at any time
Authorised Ajax Partner130+
Countries worldwide
3.5M+
Devices installed globally
7 yr
Battery life on sensors
24/7
Monitoring compatible
Brands We Trust
We install alarm systems from manufacturers known for reliability, ease of use, and long-term support.
Everything You Need,
Nothing You Don't
Monitored & Unmonitored Options
Choose self-monitored alerts to your phone, or opt for 24/7 professional monitoring with emergency response dispatch.
Smart Motion Sensors
Passive infrared (PIR) sensors detect movement with precision. Pet-immune options available for homes with animals.
Instant Mobile Alerts
Receive push notifications the moment your alarm is triggered — with zone information so you know exactly where the activity is.
Door & Window Sensors
Magnetic contact sensors on every entry point ensure no door or window can be opened without triggering the system.
Panic & Duress Buttons
Discreet panic buttons for staff safety in retail, medical, and office environments.
Wireless & Hardwired
Wireless systems for minimal disruption during installation, or hardwired for maximum reliability in new builds.
Why Choose Our Alarm Systems
Suitable For
Residential Homes
Protect your family with reliable perimeter and interior detection.
Retail Stores
After-hours protection with monitored response for high-value stock.
Offices & Commercial
Zone-based systems for multi-area commercial premises.
Rental Properties
Landlord-friendly systems that add value and reduce liability.
Schools & Childcare
Safe and compliant alarm solutions for education facilities.
Medical & Healthcare
Duress alarms and perimeter protection for healthcare environments.
Common Questions
Q.What's the difference between monitored and unmonitored alarms?
Unmonitored alarms alert you directly via your phone. Monitored alarms connect to a 24/7 response centre that can dispatch security or emergency services on your behalf.
Q.Will my alarm go off if I have pets?
Not with the right sensors. We use pet-immune PIR detectors that ignore animals up to a certain weight, so your pets can roam freely without triggering false alarms.
Q.What happens during a power outage?
All our alarm systems include a battery backup that keeps the system running for several hours during a power failure.
Q.Can I arm and disarm remotely?
Yes. Smart alarm systems can be armed and disarmed remotely via a smartphone app, and you can check the status of your system at any time.
Also Available
Ready to Secure Your Property?
Get a free, no-obligation quote from our Gold Coast team.