Since we are not locked into a single vendor, we can design and install a cost-effective custom solution for you, using best-of breed components. We can also expand an existing alarm system, increasing your level of security and the safety of your family or your business.
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There are 6 different types of sensors that home alarm systems use to detect an intruder:
1. Passive Infrared Motion Detectors
2. Ultrasonic Detectors
3. Microwave Detectors
4. Glass Break Detectors
5. Photoelectric Beams
6. Magnetic Switches
To maximize the detection of intruders on your property and minimize false positives, you need the right combination of sensors. Our alarm experts have the experience and know-how to select the optimal set of detectors to fit your property. One-size-fits-all solutions don’t offer the same level of accuracy or reliability.


Early warning of fires and poisonous gas accumulation can be the difference between life and death. In the Bay Area’s earthquake prone topology, a well-designed alarm system can be a critical factor in your family’s safety. Additionally, burglar alarm systems can save your family and property while you’re on vacation.

Monitoring and notification are critical elements of providing security. We always recommend monitoring for maximum protection of family and property but each client’s needs are different. If you want a screeching alarm that will make paint peel, we can do that. If you want 24×7 monitoring, we can do that. If you want internet-accessible cameras which you can access from anywhere in the world using our local UL listed central station, we can do that, too.
ASI is a full-service provider of custom residential and business security systems. For over 34 years we provide personal service for customers looking for Surveillance Systems (CCTV), Burglar Alarms & Data/Networking Cabling Services. We Install, Troubleshoot, Repair and Service existing systems. Our experts will design a security solution made just for you. And we'll back it with 24/7 alarm monitoring, prompt service, and on-call emergency repair.
P.O. BOX 5829
Concord, CA 94524
CA License #798562
ACO 4231
ASI, Inc. Licensed, Bonded and Insured Services | 34 years Serving The Bay Area
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