Building Automation The Leading Manufacturer of Building Automation Components

Functional Devices offers a comprehensive range of American-designed and manufactured products to support your building automation projects. From Relay in a Box® and current sensors to power supplies and transformers, our solutions are engineered to save time, money, and aggravation.

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Why Choose Building Automation Components From Functional Devices

Building automation systems should be reliable, efficient, and hassle-free. That’s why Functional Devices products are engineered to:

Install easily

Prepackaged components and intuitive designs make setup fast and straightforward, saving time on every job.

Deliver consistent performance

Our products are built for long-term reliability, minimizing downtime and maintenance.

Withstand harsh applications

Designed for demanding environments, our devices perform under pressure—indoors or out.

About Functional Devices, Inc.

We have been designing and manufacturing high-quality electronic components in the USA since 1969. Our mission is simple: to enhance lives in buildings and beyond by delivering reliable, innovative solutions for the building automation and lighting control industries.