The M Sauer Company dba Security Unlimited has been providing custom installations in the Baltimore - Washington Region since 1976.  We are a regional installation, service, and monitoring company. Service is typically provided for that day or the next day. Personal service, the same installers and sales staff provide service support down the road. No “revolving door” employees or subcontractors. The M Sauer Company offers many solutions for home and business protection. We strive to ensure the protection of your premises in a cost-effective manner, which incorporates your lifestyle and or business needs, simultaneously.

We specialize in residential, commercial, and industrial Burglar Alarm & Intrusion Detection Systems.

We install the latest Fire Alarm systems in new construction sites and retrofitting older buildings and houses as well.

At M Sauer we also install systems monitoring open spaces, car lots, or fenced in areas.

Traditional, or network based systems, including door release

Stand alone systems, IP based, or infrastructure cable

Network cable, patch panels, CAT5e and CAT6 cable, RG6 and quad shield cable

Cameras for both overt and covert, residential, commercial, DVR’s, NVR’s, digital or analog cameras, view able over the web

Magnetic or standard electronic strikes, card readers, entry systems, keypads, systems software

Secure Cloud Video footage back-up

Silent, audible, hard wire or wireless

Monitoring & notification of high water in the bilge pump area, as well as supervisory alert. 

A variety of solutions for required notification


for your free security evaluation!