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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., Russiaville, Indiana has been manufacturing quality electronic devices in the United States of America since 1969. Functional Devices began manufacturing products for the Alarm industry but eventually transferred technology to the Building Controls market. Functional Devices' current products include commercial energy management products, relays, current sensors, contactors, enclosures, sub-panels, power supplies, transformers, and accessories. FDI is the original manufacturer of the RIB® - Relay In A Box product line of prepackaged multi-purpose relays. Functional Devices has established itself as a leader in the HVAC and energy management industry and continues the business tradition of providing high quality, low cost products emphasizing excellent customer service and satisfaction.

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.


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