The functionality and catch performance of an security alarm rely on the type and operation of the detectors and reed switches etc. that make up the system.
A detector that works in one situation may not work as good in a different one, environmental factors may also play a role in the operation of a detector ( electronic or electrical interference / Wi-Fi modem interference)
Click on the link below to find out more:
https://www.youtube.com/watch?v=nP1yFRNEb7U&list=PLz97rFi-OzLfzwLhzQ0N2HYZJte56Y24P&index=2
In this video you will learn some of the factors that go into choosing the appropriate detector for your application