Encoder Products Company is founded by Bill Watts, an engineer who believed motion control could be smarter, more reliable, and more customizable. His focus was simple but bold: build encoders that solved real problems for real customers, and back them with unparalleled support.
Original Cube Encoder
EPC moved to Sandpoint, Idaho. Occupied space next to the Panida Theater.
1973
Built green building at 1601A Highway 2 and moved in.
1979
Built, moved into large building behind the green building. Currently the Forrest M. Bird Charter School.
The initial section of the Westmond building in Sagle, containing the shop and cube production, was constructed and moved into.
British Encoder Products Company was established in the United Kingdom.
Model Release - 755A
Model Release - 725
Model Release - 770
Model Release - 702, 758, 775, 776
Model Release - 260
Model Release - E-Cube
Model Release - 225, 121
In Fall 2002, EPC sold its one-millionth encoder, a Model 713-HD10 to Ground Force in Post Falls, Idaho.
Model Release - 15T/H/S
Completed additions to the original Westmond building, combining machine shop and all production lines under one roof, now known as the Sagle facility, EPC's headquarters.
Model Release - LCE
Model Release - TR1
Model Release - 25T/H
Model Release - TR3
Late summer we sold our two-millionth encoder, a TR1 Tru-Trac to Label Vision Systems.
EPC's beloved mascot is developed in a sketch by salesman, Steve Dilts. While mostly used for internal marketing and events, the marketing team decided to bring him back and give him a modernized look and life! Jump to 2025 to see how Code-E has evolved and is used more today.
Model Release - 30M
EPC invests heavily in U.S.-based machining, electronics assembly, and quality control—strengthening reliability and lead times.
As these industries scale, EPC becomes a go-to encoder partner for OEMs building high-precision motion systems.
Meeting the increasing demand for safety and reliability, EPC’s redundant encoders support critical applications in mobile equipment, cranes, elevators, and material handling.
Despite global supply chain disruptions, EPC maintains some of the fastest lead times in the industry thanks to U.S.-based manufacturing and strong supplier relationships.
EPC introduces IO-Link-ready encoders and advanced communication capabilities, helping customers future-proof their systems.
Product Launch - 25T with Terminal Block Connector
EPC strengthens offerings for mobile equipment, AGVs, AMRs, autonomous systems, and safety-rated applications.
A milestone product for EPC, the LP1 introduces laser-based, non-contact motion feedback
This innovation marks EPC’s entry into a new category of sensing technology.
While EPC has utilized Wachendorff technology in our encoders for a long time, an official partnership has now been established.
Partnering with TWK has brought in a new line of Safety Encoders to ensure the best quality in motion feedback in the mobile equipment market.
Code-E has been reborn! With an updated design, the EPC marketing team has been utilizing Code-E throughout social media, eblasts, the website, and tradeshows.
Maybe you've seen him around or maybe you even have a Code-E sticker or a Code-E stress ball!
Tru-D was introduced in spring 2026 as a relative of Code-E. She is the main representative mascot of EPC's Tru-Trac encoders such as the TR1, TR2, TR3, and the programmable, TRP.
EPC continues to evolve with a clear purpose:
• Lead the industry in encoder innovation, including non-contact, redundant, and intelligent sensing technologies.
• Strengthen engineering partnerships, offering even more rapid custom solutions.
• Enhance the digital customer experience, meeting engineers wherever they search for answers.
• Maintain fast U.S. lead times, exceptional support, and long-term reliability.
EPC's world headquarters, a 100,000 square-foot, vertically integrated facility located in Sagle, Idaho.
Throughout EPC’s history, we have been proud to say our products are "Made in the USA." Unfortunately, labeling laws have changed. Now, if there are components of a product that are entirely or substantially manufactured outside the US – even proprietary components designed by our own engineers – we cannot legally mark that product as "Made in the USA."
EPC continually strives to source as much as we can from fellow US manufacturers. Unfortunately, that’s not always possible. To provide you the highest quality and best-performing products possible, it’s sometimes necessary to source components abroad.
When Encoder Products Company was founded in 1969, it started in the garage of Bill Watt’s suburban US home. As EPC grew, the company remained committed to keeping our manufacturing in the USA, as we do to this day. So while we can no longer label our products “MADE IN THE USA,” we can tell you we will continue to be a company that proudly keeps this manufacturing facility right here in the US.
For government and defense buyers, we are registered as "Encoder Products Company" on www.sam.gov.
If you need an ECCN classification for our products, all of our incremental rotary encoders are classified as EAR99. For any other products or accessories, please contact us.