What are the three sensing device categories and their specific purposes

Answer the following research questions (25 points each) using external references.  APA must be followed.  

1. What are the three sensing device categories and their specific purposes and how would you apply them based on your experience or expert recommendations?

Guidelines: Sensing device categories include those for perimeter protection, area/space protection, and object/spot protection.

2.  How is the type of alarm transmission/signaling system used in a particular application determined and how would you apply them based on your experience or expert recommedations?

Guidelines: The location  of the business or residence, the frequency of police patrols, and the ability of the customer to afford the cost all help determine what type of alarm transmission/signaling system is used.