3M System Upgrade

Our Library


Sentry has the experience, products and customer support skills to serve a broad range of library customers in Public, School, College, Private & Government libraries.

3M System Upgrade

Make Old 3M and Sentry Library Gate Systems New Again!

The Sentry RT Controller is an upgrade for Sentry WAM-2 & MM systems, as well as 3M 3500 & 3900 to make old systems new again. By simply replacing old electronics with our RT Controller, your security gates are alive again with better tag detection and a remote tuning feature to perform system diagnostics, and adjustments via the internet.

The Sentry RT Controller has an optional built-in patron counter with LibraryAssistâ„¢ software that enables librarians to access detailed patron count reports using a local area network connection.

Electronic outputs add further security options, such as an alarm signal to trigger a video recorder.

Sentry Custom Security



3M System Upgrade

EM or RFID? It can be confusing. Our team regularly offers demonstrations and webinars to help libraries better understand their options.

Please call 800-461-2803 or click here to book a webinar.