DSC EV-DW4975 Frequently Asked Questions

What Are Door Contacts?
Sensors that are used to monitor whether a door is opened or closed are often called door contacts. Learn about door contacts and how they are used with alarm systems.

What Is the Difference Between Slim Line and Regular Alarm Sensors?
A sensor that is considered "slim line" is thinner than a regular alarm sensor. This makes slim line sensors better for applications with limited space. Learn about alarm sensors.