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Since 1969, Functional Devices, Inc. has been designing and manufacturing quality electronic devices in the United States of America. Our goal is to provide our customers with reliable and economic products along with world-class support from our sales and engineering experts.

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From the Blog

Staying Safe from High Voltage with Remote Current Sensor & Relay Combos

Problem Here’s a scenario that may be familiar: the current of a high voltage load needs to be monitored with a current sensor, and the current sensor needs an inte... Read More


RIBĀ® Relays are Versatile

Versatility… We all like it. Our most popular relay, model RIBU1C, is versatile because it can be controlled by any voltage between 10V and 30V AC or DC as well as ... Read More


Mount Your Controller and Peripheral Devices in our Prepackaged Power Supply

If you’re planning to install a controller and other peripheral devices, an important consideration is where the items will be placed within an enclosure, and how t... Read More


RIBĀ® Current Sensors Just Make Sense

RIB Split Core Current Sensor Slide Opening

Do you remember when spark plugs, an oil filter, and other critical engine components could be easily accessed by simply opening the car hood? Well I don’t, but my ... Read More


Production Team Member

Looking for a manufacturing job in the central Indiana area? Come be part of our Production Team! Functional Devices manufactures electronic... View Job


Outside Sales

How do you want to spend your work week? Surrounded by creative minds working together at a privately-owned business? Traveling to customers... View Job