Tell Your Story

Customer reviews and referrals are the life blood of our business. We appreciate your time in telling others about your experience with SI.

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Dear valued customer,

I want to thank you for being such an important part of Security Instrument. We appreciate the support and trust you have given us in being your electronic security provider. Our business, as most do, constantly involves keeping up with technology. To help keep our company in the forefront I ask that you take a moment to write us a brief review – provided below is a link to do so. Your feedback is really important to us.

Thank you for your time and continued business. Please do not hesitate to contact me with any questions. I look forward to hearing from you.

Sincerely,

Art Mattei
CEO
Security Instrument

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About Security Instrument

The power of personalized service. Protecting what matters since 1960.

History

Founded in 1960, Security Instrument Corporation, a privately held U.S. Corporation, provides electronic security and life safety detection  and associated monitoring and support services.

Services

Security Instrument offers an full line of services from professionally engineered system designs and turnkey installation services, to 24 hour system monitoring.

Service Area

Security Instrument is Delaware’s largest full-service independently-owned security company, serving thousands of customers throughout Delaware, MD, NJ & PA.