Functional Devices, Inc. has been designing and manufacturing quality electronic devices in the United States of America since 1969. Our goal is to provide high quality products for the most reliable and economical solutions to the needs of our customers, along with world-class support from our sales and engineering experts. Current product offerings include RIB® relays, current sensors, power control, enclosures, power supplies, transformers, and accessories. Functional Devices has established itself as a leader in the HVAC, Building Controls, Energy Management, Energy Savings, Lighting Controls, and Wireless industries.

Quality Statement

Functional Devices, Inc. is proud to manufacture American made electronics since 1969. Each and every product manufactured by Functional Devices, Inc. is tested to the highest performance levels at our facility during production.

Our People

Our sales team and technical support team are standing by and ready to help with all of your building automation needs.

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From unique applications to new product releases, you can keep up to date with everything RIB®, right here.

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Where can I buy your products?

We sell through a distributor model. If you’d like to purchase online, we recommend several online distributors, and we also maintain a map of local distributors that you can stop by in person.

You think Energy Management is a New Idea?

Here at Functional Devices, Inc. our roots can be traced back to our beginnings as a manufacturer of energy management products and software using “Power Line Carrier” technology. Through the years we have added many energy saving devices to our product line. The classic RIB® prepackaged relays and current sensors have been used by all major building automation contractors throughout the world as part of their energy saving strategies for building owners. In recent years we have devoted efforts to not only maintaining our high quality, low cost line of RIB® products but also expanding into newer technologies such as open protocol devices, wireless relay/current sensing solutions, specialty peripheral products, and lighting controls. These products are designed to enhance the efforts of energy managers everywhere.

Custom Products

If we do not already build a device with specifications or packaging configurations you require, we will be happy to quote and design one for you. Functional Devices is actively involved in the development, manufacturing, and production of special peripheral devices. Whether variations of existing Functional Devices products or entirely unique devices, we will help provide you with a product to fit your specific needs. Please contact us so we may review your project and special requirements.