Contact Us For Commercial Security

Complete the form below and a member of our staff will be in touch within 24 hours.

Contact Information

Commercial Sales: (800) 244-2261

Security Instrument is the largest privately owned commercial security company in Delaware. We design, install and support integrated systems for SMB’s and enterprises throughout Delaware, Pennsylvania, New Jersey and Maryland.


Wilmington, DE Office
309 West Newport Pike
Wilmington, DE 19804
Phone: (302) 633-5621

Milton, DE Office

28340 Lewes Georgetown Hwy.
Milton, DE 19968
Phone: (302) 645-2212

  • This field is for validation purposes and should be left unchanged.