Top 10 Draw Wire Encoder Manufacturers in the US

Introduction

Finding the right draw wire encoder supplier can stall a project if you choose wrong — long lead times, mismatched specs, or limited technical support all cost time and money. The global encoder market is projected to grow from $2.7 billion in 2023 to $4.5 billion by 2028 (CAGR of 11%), and draw wire encoders (also called string pots or cable-extension transducers) are driving a significant share of that growth.

These sensors serve automotive assembly lines, packaging machinery, construction equipment, and medical lift platforms — anywhere direct linear sensor mounting is impractical.

Selecting the right manufacturer means looking beyond the spec sheet. Quality consistency, lead times, technical support, and application-specific expertise all factor in. With dozens of North American suppliers to evaluate, the real challenge is telling apart broad motion-control brands from niche draw wire specialists — each with different strengths in measurement range, resolution, and environmental ruggedness.

This guide profiles the top 10 draw wire encoder manufacturers serving the US market, covering what each does well and where they fit best.

TL;DR

• Draw wire encoders convert linear displacement into rotary signals — useful when direct linear sensor mounting isn't practical
• The US market spans broad motion-control brands and niche specialists, each with different strengths in range, resolution, and IP protection
• Evaluate suppliers on measurement range, output type (incremental vs. absolute), IP rating, certifications, and lead time
• Top suppliers include FIAMA US, Dynapar, Celesco, Micro-Epsilon, and POSITAL/FRABA
• Choosing right comes down to technical fit, competitive pricing, and access to real engineering support — not just a sales rep

What Are Draw Wire Encoders and Why Do They Matter in US Industry?

A draw wire encoder is a linear position measurement device consisting of a spring-wound stainless steel cable attached to a rotary encoder on a spool. As the cable extends or retracts with the moving object, the encoder converts displacement into an electrical signal—analog, incremental, or absolute—providing precise position feedback without requiring rigid linear rails.

Typical applications include:

• Hydraulic cylinder positioning in mobile equipment
• Robotic arm tracking in automated assembly
• Elevator and crane systems for safety interlocks
• CNC machine axes where space constraints prohibit linear scales
• Medical lift platforms requiring precise position feedback
• Construction equipment monitoring boom extension

North America's encoder market is projected to reach $2.06 billion by 2030, growing at a 8.2% CAGR. Draw wire variants are increasingly common as US manufacturers automate more production stages—particularly in applications requiring measurement ranges from 50mm to 50 meters where rigid linear scales simply won't fit.

Top 10 Draw Wire Encoder Manufacturers in the US

Each manufacturer on this list was evaluated across six criteria — not brand recognition alone:

• Product reliability and build quality
• Measurement range and stroke coverage
• Output and signal versatility
• Industry certifications (ISO 9001, MIL-SPEC, etc.)
• US market presence and distribution
• Customer and application support quality

FIAMA US

FIAMA US, headquartered in Luling, Louisiana, is the North American distributor of Italian-manufactured FIAMA draw wire encoders and position measurement components. The company serves sectors from food and pharma to semiconductor, automotive, and packaging with an ISO 9001-certified product line.

The team is made up of degreed engineers — not commissioned salespeople — so product recommendations reflect actual application requirements. Short lead times and competitive pricing make FIAMA a practical choice for buyers who need reliable components without extended procurement delays.

Dynapar (Fortive Corporation)

Dynapar, a Fortive brand based in Gurnee, Illinois, is one of the most recognized encoder manufacturers in North America. The company offers a broad encoder portfolio spanning rotary, incremental, absolute, and draw wire configurations for heavy industrial and precision automation applications.

ISO 9001:2015 certified, Dynapar stands out for its competitor crossover guide and deep application engineering support — useful for teams replacing legacy encoders. Strong distribution reaches steel mills, oil and gas facilities, and aerospace operations across the US.

Celesco (Gems Sensors & Controls)

Celesco, part of the Gems Sensors & Controls portfolio, is a California-based specialist with decades of experience in cable-extension transducers and draw wire sensors. The company was among the earliest US manufacturers to develop standardized string pot product lines for industrial use.

Known for an extensive range of standard and custom configurations, rugged housings, and broad output options. Products are used in military, aerospace, medical, and industrial automation where environmental durability and long service life are priorities.

Micro-Epsilon (US Operations)

Micro-Epsilon, with North American operations headquartered in Raleigh, North Carolina, offers a specialized line of draw wire encoders (wireSENSOR series) alongside laser displacement sensors and inductive measurement systems. Coverage spans from millimeters to several meters.

Micron-level resolution options and excellent temperature stability make Micro-Epsilon a common choice for automation engineers building multi-sensor measurement setups. Housings are rated up to IP69K for harsh and outdoor environments.

POSITAL / FRABA (US Operations)

POSITAL, the industrial encoder and position sensor brand of the FRABA Group, operates in the US market with a strong draw wire encoder line under its LINARIX brand. Designed for large measurement ranges in compact housing formats suitable for mobile machinery and industrial automation.

Modular, configurable designs with flexible output interfaces make POSITAL a practical option for OEM integration. Quick configurability and solid North American distribution support reduce design-to-deployment time.

SpaceAge Control

SpaceAge Control, based in Palmdale, California, is a US manufacturer specializing almost exclusively in position transducers and draw wire sensors. That singular focus translates into deeper product knowledge and more application-specific configurations than most general encoder manufacturers offer.

Offers a wide range of cable-extension position transducers with options for extreme temperature, vibration, and shock resistance. Commonly specified for aerospace, defense, and demanding outdoor industrial environments where DO-160D and MIL-STD-810E qualification matter.

UniMeasure

UniMeasure, headquartered in Corvallis, Oregon, is a dedicated US manufacturer of cable-extension transducers (also called linear position transducers or string pots) with a focused product line developed specifically for industrial measurement applications.

US-based manufacturing supports fast delivery and direct application support. Pricing is competitive relative to broader automation brands, making UniMeasure a common choice for test and measurement, hydraulic machinery, and factory automation.

BEI Sensors (Sensata Technologies)

BEI Sensors, now part of Sensata Technologies, offers a broad portfolio of position and motion feedback products including draw wire sensors. Serves industrial, medical, aerospace and defense, and heavy vehicle markets from its US operations.

Sensata's R&D scale means BEI draw wire products undergo cross-platform testing across multiple industries before release. ISO 9001:2015 certified and broadly specified in mission-critical systems across aerospace, defense, and heavy vehicle applications.

ASM Sensors (US Market)

ASM Sensors, a German-headquartered company with active distribution and technical support in the US market, manufactures a dedicated line of draw wire encoders (posiwire® WS series) covering an exceptionally broad range of measurement strokes from under 100mm to over 60 meters.

Wide catalog depth — multiple series spanning different stroke ranges and environments — makes ASM a single-source option for engineering teams specifying across several machine types. Strong IP protection ratings and multiple output options per product family reduce the need to source from multiple vendors.

How We Chose the Best Draw Wire Encoder Manufacturers

This list was developed by evaluating manufacturers on six key criteria: US market availability and lead time, product measurement range and resolution, output type versatility, IP/environmental protection ratings, quality certifications (ISO 9001 or equivalent), and depth of technical and application support.

The most common mistake buyers make is selecting on price or brand recognition alone — without checking whether the manufacturer's standard range actually matches their stroke, output, and environmental requirements. That mismatch can delay commissioning by weeks.

A supplier with shorter lead times and real engineering support reduces integration risk. Certified product lines matter even more in regulated industries like pharma, food processing, and medical equipment.

Business outcomes matter:

• US-based manufacturers like UniMeasure and SpaceAge Control often deliver 2-4 weeks faster than European imports — a real difference when projects are on a deadline
• Application engineers (not just sales reps) catch specification mismatches before they become expensive commissioning delays
• ISO 9001 is the baseline; food and pharma applications may also require IP69K ratings and FDA-compliant materials, while hazardous environments need ATEX or UL certifications

Use these criteria as a checklist before shortlisting any supplier — the right match on paper saves significant time and cost once installation begins.

Conclusion

Choosing a draw wire encoder manufacturer in the US is an engineering decision that directly affects measurement accuracy, equipment uptime, and long-term operating costs. The right supplier fits your specific application — the right measurement range, output type, IP rating, and actual technical support when integration questions come up.

Evaluate suppliers based on measurement range fit, available outputs, IP rating for your environment, and the ability to reach a technical expert quickly when integration questions arise. FIAMA US carries ISO 9001-certified draw wire encoders and position measurement components, and their team is made up of degreed engineers — not commissioned sales staff — so the guidance you get is based on your application, not a quota.

Reach out to discuss your application and get a quote with no sales pressure at 504-352-0986 or info@fiama-us.com.

Frequently Asked Questions

What is a draw wire encoder and how does it work?

A draw wire encoder (also called a string pot or cable-extension transducer) consists of a stainless steel cable wound on a spring-loaded spool attached to a rotary encoder. As the cable extends or retracts with a moving object, the spool rotation is converted into a linear position signal (analog, incremental, or absolute).

What industries use draw wire encoders most commonly?

Draw wire encoders are widely used wherever direct linear sensor mounting is impractical. Common US applications include:

• Automotive manufacturing and hydraulic cylinder systems
• Construction and mobile equipment
• Packaging machinery and CNC machine tools
• Medical lift platforms, robotics, and semiconductor handling equipment

What is the difference between an incremental and absolute draw wire encoder?

Incremental encoders output pulses relative to a starting reference point—position is lost if power cycles. Absolute encoders retain exact position data even after power loss, providing immediate position readout at startup without a homing cycle. Absolute types are preferred for safety-critical applications.

What measurement ranges are typically available for draw wire encoders?

Commercial draw wire encoders cover stroke ranges from approximately 50mm up to 50 meters or more. Compact models serve 50–900mm applications; heavy-duty industrial models extend to 60 meters for crane and construction equipment.

What certifications should I look for when selecting a draw wire encoder manufacturer?

ISO 9001 certification is the baseline quality standard. Applications in food, pharma, or hazardous environments may also require IP67/IP69K-rated housings for washdown resistance, ATEX/UL certifications for explosion-proof environments, or FDA-compliant materials for direct food contact.

How do I select the right draw wire encoder for my application?

Before contacting a manufacturer, pin down these six parameters:

• Required measurement stroke and mounting constraints
• Output signal type (analog, incremental, or absolute)
• IP rating, operating temperature range, and power supply

Working with an application engineer rather than a sales rep helps avoid specification mismatches that delay commissioning.