Why Dedicated Outdoor Perimeter Alarms Outperform Cameras with Built-In Deterrents
What Makes an Effective Deterrent?
A deterrent must stop intruders before they reach your door. In the real‑world, the only thing that immediately drives thieves away is an ear‑piercing siren—not a flashing light or a polite voice message. Our Ajax Street Siren and Axis D4100‑E Network Strobe Siren blast up to 113 dB, similar to a live rock concert. Most camera speakers peak at 70–80 dB (busy‑café level), so they simply don’t cut it.
The video below demonstrates the importance of a siren, it’s not the camera or the flood light the detracted the thief, it was only once the siren activated were they deterred.
Power & Audio Output Limits of Camera Sirens
To stay “budget‑friendly,” cameras use low‑power PoE, which caps the potential for speaker volume. Dedicated sirens draw more current and deliver a shock factor cameras can’t match—making them the smarter choice for outdoor perimeter protection in Brisbane’s Properties
Reliability & Accuracy
Consumer‑grade cameras priced under $500 are packed with unproven analytics and hardware rushed to market. Homeowners end up beta‑testing new firmware, suffering false alarms and expensive service calls. In contrast, purpose‑built sensors such as the Ajax MotionCam, Ajax DualCurtain are engineered solely for detection accuracy. Dual‑beam optics plus onboard algorithms virtually eliminate false triggers from pets, foliage, or passing cars.
Performance Advantages of Dedicated Sensors
Instant visual verification – Ajax MotionCam snaps a series of images the moment it detects movement, so you know whether it’s a prowler or a possum’s tail dangling in front of the sensor.
Wireless flexibility – Ajax sensors create a secure mesh network, slashing labour costs and avoiding messy trenching.
Scalable zones – Protect front yard, side access, and pool area independently, then add more zones as your needs grow.
The Real Cost of Quality in Brisbane
Labour is a major expense in any security installation—not the hardware. A typical six‑camera residential setup takes two technicians a full day (~AUD $2,000 ex GST). Hardware for a professional Ajax surveillance system sits around $3,500 ex GST. Trying to “save” on gear usually means paying twice for call‑backs and replacements.
Want maximum bang for buck? Our Ajax Outdoor Alarm Starter Kit (AUD $2,495 ex GST) protects the most common entry point—the front of your property—with the same 113 dB siren tech and expandable wireless sensors. Many clients find they can downsize their camera count once a proper perimeter alarm is in place bringing total cost of deployment similar to a comprehensive cameras installation.
Conclusion
For Brisbane homes and businesses that value reliability, accuracy, and true deterrence, dedicated outdoor perimeter alarms win every time. Cameras are excellent for evidence, but sirens stop crime in its tracks.
Ready to harden your perimeter?
👉 Book a free on‑site security assessment with our local team or call (07) 5235 4444.