About Us

About Us

Sentry Custom

We are a subsidiary of Custom Security Industries Inc. a manufacture of value added EAS tagging solutions encompassing EM, AM, RF and RFID technologies.


Sentry designs, manufactures, markets and services a complete line of Library patron self service and security systems, labels and accessories using both EM and RFID technology.


With experience dating from 1988, our customers include leading public, academic and specialty libraries relying on inventive, customer focused security solutions.

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.