Welcome to Piezo-Metrics

Piezo-Metrics, also operating as Micron Instruments, has been supplying high-quality semiconductor strain gages, pressure transducers and temperature sensors for over four decades. Our standard semiconductor strain gages are made from “P” doped bulk silicon and have no P/N junction with the silicon etched to shape. This rigorous process eliminates potential molecular dislocation or cracks and optimizes our strain gage’s performance under all types of demanding situations and environments. Piezo-Metrics’ strain gages have been used in the manufacture of many different types of sensors such as load cells, torque meters, pressure transducers, accelerometers, and precision extensometers.

We also provide professional installation of strain gages on customer products along with the option of temperature compensation and calibration. Our staff of experienced engineers are experts at designing custom sensors and special strain gages to meet your unique needs.

Piezo-Metric’s standard line of pressure transducers have corrosive-resistant Titanium diaphragms and are available in a wide assortment of pressure ranges. Typical applications are for OEM, process control, and liquid level measurement. In addition to our standard line of Titanium transducers, Piezo-Metrics has experience in providing sensors made of 17-4PH CRES, 316SS, Inconel, Tantalum, Aluminum, Beryllium Copper, Invar Plastics, and others.

Dual pressure/temperature transducers, pressure transmitters with 4-20 mA outputs, and dual pressure/temperature transmitters are available in all of the physical configurations of our standard pressure transducers. The dual sensors incorporate silicon temperature sensors manufactured by Piezo-Metrics, which are more accurate and easier to use than thermistors. These temperature sensors can produce a 100 mV change with 5 VDC excitation between 30°F and 130°F. Our Smart Electronics provide a 0-5v, 0-10v, or 4-20 mA. signal from an unregulated source. It provides a field re-calibration option (16 to 35 VDC) and other interesting advantages.

Our customers are the most important people in the world to us and the Piezo-Metrics team is standing by to assist you with your application. Please feel free to contact us if you have any questions or need any assistance. We look forward to serving you today!

Mission StatementTo deliver world-class semiconductor strain gage solutions


The team of engineers, scientists, and technicians at Piezo-Metrics is internationally recognized for its expertise in pioneering the most advanced and reliable strain-gage solutions available. Individually and collectively, they represent the high standard of excellence that has earned and maintained Piezo-Metrics’ unparalleled reputation.

  • Picture of Herbert Chelner smiling

    Herbert Chelner

    Our Beloved Founder

    Herb has always had the curiosity and passion that characterizes great scientists and engineers. After serving in the U.S. Army in the Missile Command, Herb set out to be a world-class rocket scientist and pursued higher education. He has degrees in Chemistry, Physics, and Aeronautical Engineering (with an Electronics minor) and did extensive coursework in mathematics, computer programming, and semiconductor electronics.

    Herb’s professional career started as an Aeronautical Engineer for the U.S. Navy, and then an Instrumentation Engineer at Rocketdyne. While at Rocketdyne, Herb became a sensor expert and discovered the benefits of semiconductor strain gages.

    After serving as Chief Engineer at Dynasciences Corp and Vice President at Valid Data, Herb co-founded Senso-Metrics, and began a successful career as an entrepreneur and sensor designer. It was during his tenure at Senso-Metrics, that Herb’s vision of a semiconductor strain gage manufacturing business led him to acquire the assets of Micron Instruments in 1980 and incorporate as Piezo-Metrics, Inc. dba Micron Instruments.

    Today, Piezo-Metrics is the world’s leading supplier of semiconductor strain gages and sensor gaging services, with over 100 customers in over 40 countries.

    Herb is best known for his keen insight in sensor design and passion for guiding Piezo-Metrics’ product division and its customers in creating world-class sensors. It was Herb that designed the worldwide standard sensor for monitoring solid rocket motor aging, recognized by NATO as a key component in improving safety and reducing lifecycle costs of expensive and mission-critical assets. And it was Herb who played a key role in the design of one of NASA’s Mars 2020 Perseverance robot sensors, now roaming the red Planet.

    Herb passed away in March 2022. His Legacy will live on, as Piezo-Metrics continues to drive innovation and technical leadership and a strong commitment to customer satisfaction.

  • Picture of Robert Mueller smiling

    Robert A. Mueller, Ph.D.

    CEO, Chairman of the Board of Directors

    Dr. Robert Mueller possesses over 40 years of experience in technical team management, engineering development, and consulting, including high-speed parallel computers, computer operating systems, sensors, and wireless sensing communication systems. During his career he has developed advanced wireless tracking systems for the U.S. Navy Supply Command (Aviation Repair Parts), U.S. Navy Munitions Information Systems (tracking Navy, Marine Corp, and Coast Guard munitions, worldwide), and the U.S. Marine Corp Aviation Logistics Squadron (Expeditionary Pack-up Kits for forward deployment). He has also designed and installed the first zero-SSD wireless sensing system to be deployed in live missile containers in the central U.S. Air Forces in Europe (USAFE) munitions storage area, as well as served as an International Consultant and Wireless Sensing Subject Matter Expert for Raytheon Missile Systems.

    Dr. Mueller was the technical lead on the development and test of the wireless sensing system for U.S. Air Force Research Laboratory (AFRL) Integrated Motor Life Management, Data Acquisition and Analysis program (IMLM DAAS) and a technical team member on the AFRL Motor Aging and Surveillance project. He has been a U.S. appointed Technical Member of the NATO Power & Propulsion Panel, Applied Vehicle Technology, Science & Technology organization since 2007 and has received the 2016 NATO Scientific Achievement Award for co-chairing a Munitions Health Management technology demonstration at the NATO Headquarters, Brussels.

    Dr. Mueller was tenured Associate Professor of Computer Science at Colorado State University and currently serves as the CEO and Chairman of the Board of Directors at Piezo-Metrics, Inc.

  • Picture of Paul Kim smiling

    Paul Kim

    Transducer and Gaging Production Manager

    Paul Kim has served as Production Manager for Piezo-Metrics for over three decades. During that time Paul’s extensive experience has included a mastery of sensor engineering, electronics, instrumentation, and testing. His impressive resume includes knowledge of Wheatstone bridge temperature compensation principles, Dual Bond Stress and Temperature (DBST) sensor fabrication, wiring and packaging, and sensor pressure and temperature characterization procedures. Additionally, he has balanced and temperature compensated hundreds of DBST sensors and client transducers as well as thousands of the MP line of pressure transducers.

    He currently recruits and trains production technicians for the company along with organizing gaging production schedules to meet the company’s sales demands.

  • Picture of Bryan Pierce smiling

    Bryan Pierce

    Quality Assurance Manager

    With over thirty-five years of experience in the Test & Measurement Industry, Bryan Pierce brings valuable expertise in military, space, oil, and medical applications to the Piezo-Metrics’ team. During his lengthy career at Senso-Metrics his duties included Engineering and Document Control, Quality Control and Inspection Manager, Research and Development of new and existing products, and serving as a Purchasing Manager. He also is a Certified IPC J-STD-001 solder trainer (CIT).

    As the Quality and Assurance Manager at Piezo-Metrics, Bryan is continually working towards improving products and services with a focus towards inspection of finished products and processes, implementation of quality procedures to ensure product quality, and analysis and response to customer issues.