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Functional Devices, Inc.
PO Box 437
Sharpsville  IN  46068
United States
Tel: +1 765-883-5538
Fax: +1 765-883-4262

Functional Devices, Inc. Logo

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.

LonMark Contact Information:

Matthew Long
Engineering Manager
Tel: +1 765-883-5538 x426
E-mail: m.long(a)


Listing of LonMark Certified Products:


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Functional Devices, Inc.
joined LonMark as a Member over 10 years ago.


Membership to LonMark International is open to any company, organization or individual committed to the development, manufacture, and use of interoperable open, multi-vendor control systems utilizing ISO/IEC 14908-1 and related standards.

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