Top-rated Local Alarm Company in Wilmington, DE 

With over 60 years of experience in the security and life safety environment, Security Instrument is the largest privately-owned home security company. We offer a wide selection of products from some of the most trusted manufacturers in the industry. Our clients can choose from a full complement of personalized support services to back up their system and help safeguard their people and property.

Security Instrument offers a full line of services from professionally engineered system designs and turnkey installation services, to 24-hour system monitoring. They are serving thousands of customers in Bear, Kirkwood, Winterthur, and throughout the Delaware area. 

Who Do We Serve?

Our clientele is diverse and includes homes, small retail, jewelry stores, education, financial, chemical, pharmaceutical, precious metals, manufacturing, and more. SI maintains its industry-leading position by offering a diverse range of technologically advanced products and services, as well as comprehensive solutions that address all elements of security and life safety.