Choosing the right rotary encoder manufacturer can directly impact your system accuracy, reliability, and long-term operating costs. With so many rotary encoder manufacturers in the USA claiming high precision and durability, engineers, OEM buyers, and automation integrators often struggle to identify suppliers that truly meet industrial standards. Factors such as encoder resolution, signal stability, delivery lead time, technical support, and customization capability all play a critical role in real-world applications.
To help you make an informed decision, we've researched and compiled a practical list of the Top 10 Rotary Encoder Manufacturers in the USA, highlighting their core products, strengths, and ideal use cases. Whether you're sourcing encoders for CNC machines, robotics, or automation systems, this guide will save you time and reduce risk. Check the list below and ask for a quote from the manufacturers that best fit your application.
| Top 10 Rotary Encoder Manufacturers in the USA |
|---|
| 1. Encoder Products Company (EPC) |
| 2. Hopo Tech |
| 3. Dynapar |
| 4. US Digital |
| 5. Grayhill |
| 6. Bourns, Inc. |
| 7. CUI Devices |
| 8. Honeywell |
| 9. Avtron (Nidec / Avtron Automation) |
| 10. BEI Sensors |
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Main Products: Incremental & absolute encoders (Accu-Coder series), hollow-shaft and shafted encoders, kit encoders, accessories.
Introduction: Encoder Products Company is a leading rotary encoder manufacturer in the USA, headquartered in Idaho and known for its Accu-Coder® product line. EPC specializes in incremental and absolute rotary encoders, including shafted, hollow-shaft, and kit encoders designed for demanding industrial environments. With in-house engineering, machining, and assembly, EPC ensures high quality, fast lead times, and excellent customization capabilities. Their rotary encoders are widely used in automation, packaging, robotics, material handling, and heavy machinery. EPC is particularly valued by OEMs seeking Made-in-USA rotary encoders with reliable performance, flexible mounting options, and strong technical support.
Main Products: Magnetic Rotary Encoders, Optical Rotary Encoders
Introduction: Hopo Tech is a professional rotary encoder manufacturer in China, specializing in the R&D and production of magnetic and optical rotary encoders, linear encoders, and digital readout (DRO) systems. With over 15 years of experience in motion control and automation, Hopo Tech delivers cost-effective, high-precision encoder solutions trusted by global OEMs. Its product range includes optical rotary encoders, magnetic rotary ring encoders, incremental and absolute encoders, designed for CNC machines, robotics, semiconductor manufacturing, lithium battery production, and industrial automation. Backed by patented signal-processing algorithms, ISO 9001 and CE certifications, and fast global delivery, Hopo Tech is a reliable partner for customized rotary encoder solutions worldwide.
Main Products: Incremental and absolute encoders, brushless/frameless resolvers, industrial feedback devices.
Introduction: Dynapar is one of the most recognized rotary encoder manufacturers serving the U.S. market, offering a broad portfolio of motion feedback solutions. Its brands—including Dynapar, NorthStar, and Harowe—cover incremental encoders, absolute encoders, and resolvers for industrial and heavy-duty applications. Dynapar rotary encoders are known for precision, durability, and resistance to shock, vibration, and harsh environments. They are commonly used in factory automation, elevators, cranes, energy systems, and steel processing. With strong engineering expertise and global manufacturing backed by U.S. operations, Dynapar remains a trusted supplier of high-performance rotary encoder solutions.
Main Products: Optical incremental & absolute encoders, motor/kit encoders, miniature and high-resolution encoders.
Introduction: US Digital is a well-established U.S.-based rotary encoder manufacturer headquartered in Washington State. The company designs and produces a wide range of optical incremental and absolute encoders, including compact motor encoders, kit encoders, and high-resolution rotary encoders. US Digital is especially popular among OEMs, automation engineers, and robotics developers due to its quick delivery, broad product selection, and competitive pricing. Its rotary encoders are used in robotics, medical equipment, CNC machinery, and motion control systems. With strong emphasis on innovation, customization, and U.S. manufacturing, US Digital is a preferred choice for precision encoder applications.
Main Products: Machine rotary encoders, optical & mechanical encoders, haptic/volume encoders and control interfaces.
Introduction: Grayhill is a respected rotary encoder manufacturer in the USA, known for combining encoder technology with human–machine interface solutions. The company produces optical and mechanical rotary encoders designed for panel mounting, industrial controls, and aerospace-grade applications. Grayhill rotary encoders offer long life cycles, consistent signal output, and precise tactile feedback. They are widely used in industrial automation, avionics, defense systems, and professional equipment interfaces. With decades of engineering experience and U.S.-based manufacturing capabilities, Grayhill delivers reliable rotary encoder solutions that meet strict quality and performance standards.
Main Products: Contacting and optical rotary encoders, potentiometric encoders, control knobs and panel encoders.
Introduction: Bourns is a globally recognized electronics manufacturer with strong U.S. roots and engineering presence, offering a diverse range of rotary encoders and position sensors. Its portfolio includes contacting, optical, and potentiometric rotary encoders for industrial, automotive, and consumer applications. Bourns rotary encoders are known for compact designs, stable electrical performance, and cost-effective solutions for high-volume production. They are commonly used in control panels, HVAC systems, automotive electronics, and instrumentation. As a trusted rotary encoder supplier, Bourns combines innovation, global manufacturing, and strong technical support to serve customers worldwide.
Main Products: Panel & PCB rotary encoders, optical and magnetic encoders, incremental encoders for electronics and OEMs.
Introduction: CUI Devices is a U.S.-headquartered manufacturer specializing in electronic components, including rotary encoders for OEM applications. The company offers a wide selection of incremental rotary encoders, available in optical and mechanical designs for PCB and panel mounting. CUI rotary encoders are widely used in consumer electronics, industrial controls, medical devices, and automation equipment. Known for compact form factors and competitive pricing, CUI Devices supports engineers with detailed datasheets, CAD models, and fast sampling. Its encoder solutions are ideal for projects requiring reliable performance, efficient integration, and scalable production.
Main Products: Magnetic rotary position sensors, contactless (Hall effect) encoders, industrial position sensors.
Introduction: Honeywell is a global technology leader with extensive U.S. operations, providing advanced rotary position sensors and encoder solutions. Unlike traditional optical encoders, Honeywell focuses on contactless magnetic and Hall-effect rotary encoders, delivering high reliability and long service life. These rotary sensors are designed for industrial automation, aerospace, HVAC systems, and transportation equipment. Honeywell rotary encoders perform well in harsh environments, offering resistance to dust, moisture, and temperature extremes. With strong R&D capabilities and industry certifications, Honeywell is a trusted name for high-reliability rotary encoder technology in mission-critical applications.
Main Products: Rugged incremental encoders, hollow-shaft encoders, heavy-duty industrial encoders (ATEX options available).
Introduction: Avtron, part of Nidec, is a specialized rotary encoder manufacturer serving the U.S. industrial market, with a strong reputation for heavy-duty solutions. Avtron focuses on incremental rotary encoders designed for extreme environments, including high shock, vibration, and temperature conditions. Its encoders are commonly used in mining, steel mills, conveyors, elevators, and wind energy systems. Known for rugged housings and reliable signal output, Avtron rotary encoders help reduce downtime and maintenance costs. For applications requiring durability and long-term stability, Avtron is a preferred industrial encoder supplier.
Main Products: High-performance optical and magnetic encoders (incremental & absolute), rugged encoders for extreme applications.
Introduction: BEI Sensors is a well-known name in high-performance rotary encoder manufacturing, with strong presence in the U.S. market through engineering and distribution networks. The company offers optical and magnetic incremental and absolute encoders designed for aerospace, defense, medical, and industrial applications. BEI rotary encoders are recognized for high accuracy, custom configurations, and compliance with strict industry standards. They are often selected for applications requiring precision, reliability, and environmental resistance. With decades of experience in motion sensing technology, BEI Sensors remains a trusted rotary encoder supplier for specialized and demanding applications.
Selecting the right rotary encoder manufacturer is not just about specifications—it's about long-term reliability, technical support, and application expertise. The top rotary encoder manufacturers in the USA featured in this list share several key strengths: proven engineering capabilities, consistent signal accuracy, durable designs for industrial environments, and strong support for OEM and automation projects. Most of them also offer both incremental and absolute rotary encoders, ensuring compatibility with CNC machines, robotics, and advanced motion control systems.
Beyond technical performance, leading rotary encoder manufacturers stand out by offering fast delivery, customization options, and compliance with global quality standards such as ISO and CE. These factors help reduce downtime, lower total cost of ownership, and ensure stable operation in demanding applications.
Why Hopo Tech Stands Out as a Strategic Choice
While many U.S.-based manufacturers excel in performance, Hopo Tech offers a compelling alternative for buyers seeking cost-effective, high-precision rotary encoder solutions without compromising quality. With over 15 years of experience, Hopo Tech specializes in magnetic and optical rotary encoders, including incremental, absolute, and rotary ring encoders designed for CNC machining, semiconductor manufacturing, robotics, and automation systems.
What sets Hopo Tech apart is its combination of advanced patented algorithms, stable signal output, and flexible customization. Backed by ISO 9001 and CE certifications, fast global delivery, and responsive technical support, Hopo Tech is well-suited for OEMs and system integrators looking to optimize performance while controlling costs.
If you're comparing rotary encoder manufacturers for your next project, review your application requirements carefully and evaluate both performance and value. Check specifications, compare solutions, and ask for a quote from Hopo Tech today to find the right rotary encoder for your system.
