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Sentry Alarm Voted Best Alarm Company, Union Democrat

Serving the Communities We love in Tuolumne and Calaveras Counties, California


It is always great to receive an honor, but it is even better when it comes from the community you serve. Recently, readers of the Union Democrat voted Sentry Alarm the Best Alarm Company serving the Sonora and Sierra Nevada foothills area of Tuolumne and Calaveras Counties, California.


We esteem this honor highly because it comes from those who know us, who have done business with us, and those we serve. As anyone who runs any sort of business understands, it takes time and consistency to develop a trusted reputation in any community, and not a lot to destroy your good name.


Since 1971, we have been steadily building trust by providing the kind of service the “big guys” can’t provide at values none can beat. We consider our customers part of the family and uphold the highest standards of training, service, and technologies to serve our community.

This honor means that our customers see our dedication and passion for meeting the life safety and personal protection needs of our community with the utmost levels of integrity. For this, we are deeply grateful and humbled.



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