Overview of external detection
The Detectors Role
External alarm systems can operate alone as a sole source of protection, they are also ideal for sites covering large areas where the cost of employing perimeter guards would be excessive. They can also be an important element in a comprehensive security situation. External detectors can act as the first line defence; they detect intruders while they are still outside premises preventing them from gaining access to the people and valuables inside also helping prevent theft and vandalism outside.
Challenges of the Environment
The challenges of external security are very difficult compared with the challenges posed by indoor security systems. Indoor environments are relatively stable and controlled, with changes in temperature usually gradual. The outdoor environment is the opposite, unstable, not at all controlled, and very unpredictable, therefore external detection has a much greater complexity.
The high false alarm rate displayed by external detectors stems from the technological problems that the environment presents. External detectors up until now have been unable to accommodate the huge amount of ever changing boundaries and events that will cause false alarms - fast changes in temperature due to the sun, gusts of wind, clouds, hale, rain and snow together with different background materials cooling down and heating up at varying rates, reflections can also trigger PIR detectors.
Moving objects such as debris being blown around in high winds, swaying bushes and tree limbs can adversely affect Doppler Microwave detectors.
Many external detectors do not have anti masking, a feature we feel is essential. For instance, detectors placed on a church roof, often out of sight, can be masked by falling leaves or bird droppings, not to mention human intervention - rendering the detector useless.
Most probably, the highest contributors of false alarms are birds, flying close to a detector that triggering both Doppler microwave and PIR - Blue-Fox solves this very major issue.
Blue-Fox solves the old challenges!
Features
Blue-Fox can be tailored to individual needs see the following features and options:
- Animals under the height of 70cm (2' 4") will not trigger Blue-Fox.
- Sway recognition on both PIR and microwave channels
- It takes both detectors with a combined 8 sensors (2 microwave and 2 PIR's in each) to all confirm a positive detection before an alarm situation is signalled.
- Anti masking and anti tamper are the exceptions to above, triggering individually
- For very remote protection without an electricity supply, we can offer a battery powered system that in an alarm situation will sound a siren and/or autodial several phones advising the alarm has been triggered or call a monitoring station.
Optional
- Switch on lights or any electrical devices.
- Wireless key fob remote controls.
- A low voltage light can automatically be switched on when the system is armed to advise friends and family
- Activate CCTV cameras
- Play a pre-recorded message.
- Contact a monitoring station that has instructions in the event of an alarm situation.
- Sound an alarm siren.
- Auto dialer - several phone numbers can be stored and should the first not respond it will automatically dial the next preset number and so on.
Eight individual channels from two independent detectors per protected zone ensures you will not have the traditional external detection problem - False Alarms
