Sentry Protective Systems

At Sentry, we are proud that over 90% of our new alarm system business is referred to us. This says a lot as most of our competitors out spend us in advertising. We prefer to spend money taking care of our customers. For example we are available 24 hours a day, 7 days a week. With over 50 years of staff experience we confidently proclaim to be "New England's Premier Alarm Company".