Hey @frank3si. Once the Contact Sensor has been added to your Ring system through “Set Up a Device,” you will see it under your Ring app > Main Menu > Devices > Alarm Base Station > and then if you scroll down in that section in the app, you will see them listed for you there. For the website, you will have to hover over your name at the top right > Devices > Alarm > and then you will see the contact sensors listed here. Hope this helps! 
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