It is often mentioned that one should constantly upgrade their alarm system, as an ageing system poses a danger to you and your family. One component to understand is the PIR, which are the “eyes” in your home or business.
PIR’s are Passive Infrared Detectors, which means that they detect heat. The PIR constantly measures the temperature of the back ground that it is facing, and then uses that as a base to detect temperature changes, and places the background in blocks.
The PIR has criteria which need to be met before it activates:
- First is that it needs an object, warmer than the back ground temperature by at least 3 degrees Celsius, to move between itself and the back ground that it is measuring.
- Secondly, the object needs to move in three or more temperature measuring blocks, and in a specific time frame.
If both of the criteria are met, the PIR will activate.
When PIR’s deteriorate, there are two possible outcomes. It can become more sensitive, which happens when the device deteriorates to a point that it detects temperature in a wider range, which will start causing false alarms.
The second possible outcome is that the PIR can become less sensitive. This is when the device becomes sluggish and struggles to detect, or does not detect anything at all. These are often discovered when it is too late; as the criminal gains access and the alarm does not activate.
It is for this reason that we urge clients to constantly test their alarm system, to uncover any possible problems before finding yourself in an emergency situation instead of realising there is a problem in the middle of an emergency. It is recommended that alarm systems are tested twice a month.
It takes only a few minutes to test your system and can be done over the phone. Call our team on 0861 585 585 to test your alarm system.