Thayer Scale – Hyer Industries is a privately held manufacturing & technology company, specializing in the manufacturing of equipment used for the continuous weighing and feeding of bulk materials for a wide variety of industries. The company has one of the longest uninterrupted operating records for engineering and manufacturing specialized continuous weighing and feeding equipment in the United States.

Founded in 1949 in a garage in Rockland, Massachusetts and relocated shortly thereafter to the neighboring town of Pembroke, the company has maintained its original business philosophy, product line specialization, and operating structure for more than a half century. Employee turn-over has consistently been very low permitting the company to develop a highly experienced workforce in each functional area of the business. This high degree of stability, continuity of leadership and laser-sharp product focus has been fundamental to the continued technical advancement of our uniquely designed conveyor belt scales and gravimetric feeders. It has allowed the company to grow from its early roots to its position today as one the global leaders in the continuous weighing industry.

From Loss-In-Weight Feeders that feed vitamins into cereals at rates below 1 pound per hour, and Weigh Belt Feeders that feed coal at 2,000 tons per hour, all the way up to Conveyor Belt Scales that weigh ore at over 10,000 tons per hour, Thayer has one of the most diverse product portfolios in the industry. At the heart of this portfolio lies our fundamental core technology resulting from our 65-year commitment to Research and Development. Three areas form the basis of our technology:

01. Scale Technology

including the FMSS suspension scale design providing high accuracy, sensitivity and tolerance to noise and process variation.

02. Instrumentation

including numerous unique, patented algorithms to support Scale Location Compensation, noise and event suppression, and process optimization.

03. Material Handling Solutions

Including our patented Bridge-Breaker technology and the unique Spiralator Hopper Agitation system.


Meet Our Team

Frank Hyer

CEO / Chairman

Frank joined Thayer Scale in 1963 as manager of engineering and manufacturing. Frank was promoted to General Manager in 1965.  In 1973 Frank acquired Thayer Scale from Cutler-Hammer and founded Hyer Industries.  Frank has been an active innovator in the continuous weighing field since first publishing his Mechanical Engineering Master’s thesis entitled “A Scientific Approach to Conveyor Weighing” at the University of Wisconsin.  Frank also has math and engineering degrees from Ripon College and the University of Delaware.

Frank is an active member of the American Society of Mechanical Engineers and the International Society of Automation. He has served as past director of the Process Weighing Committee of ISA, and he helped to draft the committee’s input to the National Bureau of Standards Handbook 44. Frank is an active patentee and contributor of technical articles in the fields of weighing and material handling.

Frank is married, has 3 children and 4 grandchildren.  He enjoys golf, travel and spending time with his family.

David Hyer

President / General Manager

David rejoined Thayer Scale in 2013 as Vice President and General Manager responsible for all day to day operations of the company. David was first employed by Thayer Scale in 1985 as a college student where he wrote machine-level code for PI-164 instrument.

Prior to coming to Thayer, David was most recently Division Manager for Teradyne’s Circuit Board Test and Inspection business. Prior to that, David held several senior management positions in Sales and Business Development at Teradyne and 2 VC-backed startups.  David graduated from Tufts University with a BSEE degree.

David is married and has 3 children. In his spare time he plays tennis, golf and enjoys spending time on his boat.

Paul Cleary

Vice President – Finance

Paul joined Hyer Industries-Thayer Scale in June 2013.  He is responsible for managing the company’s finances and Operations functions including manufacturing, engineering, materials and spare parts.

He has over 30 years of experience in the design and manufacture of capital equipment.  Prior to joining Thayer Scale he held senior management positions in finance/operations at Dynavac, Butler Automatic and Thermo Electron.  Paul is a graduate of Stonehill College where he earned a Bachelor of Science degree in Accounting.

Paul is married and has 4 children and 7 grandchildren.  In his free time he enjoys golfing, travelling and spending time with his grandchildren.

Thayer Scale Core Values

Thayer Scale has a long, proud history of delivering innovative, robustly engineered, high quality weighing systems that exceed our customer’s expectations. We are proud to live by a set of core values that remind us of our heritage while ensuring our future. These core values are:

  1. Technical Excellence: The core of our business is designing and delivering products that provide precision, accuracy, exceptional value, reliability, and fit to purpose. To achieve this, we are innovative, creative, and attentive to details.
  2. Continuous Improvement: We are committed to continuous improvement and we work every day to define, refine and optimize all of our business processes.  We utilize Lean Management principles to help guide us.
  3. Respect for People: We treat people well; customers, coworkers, suppliers and our community. In our daily interactions we are open, honest, direct and respectful.  We meet our commitments, large and small.
  4. Exceeding Customer Expectations: Ultimately everything we do is designed to exceed the expectations of our most demanding customers. We are not afraid to take on difficult challenges. We go the extra mile.

A Legacy of Innovation

Our custom-design philosophy not only ensures that the performance of our equipment meets the design objectives, but often our approach will also enable significant cost savings over cookie-cutter alternatives. For example, we will often enable the elimination of conveying elements due to our ability to design our solution to support elongated or inclined conveyor configurations. Competitive alternatives that are not engineered to fit the operating environment will fall short in terms of accuracy, reliability and economic payback.


Thayer Scale – Hyer Industries is Founded


Automatic Filling Machine for Bagging & Packing of Bulk Materials

Automatic Check Weigher for Bags, Drums & Cases


Loss-In-Weight Feeder for Dispensing Solids, Liquids & Gases

Anticipatory Feed Cut-Off Control for Bag & Drum Filling Scales


Footage Counter Calibration Method for Conveyor Belt Scales & Weigh Belt Feeders

Overload Protection of Strain Gage Load Cell

Digital Electronic Integration System for Belt Scales & Weigh Belt Feeders


Discharger with Dead Load Compensation for retrofitting Existing Hoppers & Bins

Level Measuring System for Bulk Material Storage Facilities


Weigh Length Temperature Compensator for Conveyor Belt Scales


Cable Flexure Suspension Scale for extreme load positioning


Load Sensing System with Flexure Plate


System and Methods for belt conveyor weighing based on virtual weigh span