Crism Security | Deltabell Alarm Installations in Doncaster

Grading of Intruder Alarm Systems Explained

People ask me what does a Graded Intruder Alarm mean? Do I need a graded one? Do I need to check my present alarm? How do I know if it is graded if I have no paperwork and I have inherited the system? So, I hope I can clarify some of your queries…

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