The benefits of using well-proven strain gauges
Sensors are extremely important in the modern world. They are used to measure many different quantities in diverse applications such as testing, data acquisition, automation and quality assurance. This means that the market is expanding rapidly (1) and new methods are appearing.
This trend towards a wider choice of technologies can lead to increased enthusiasm. However, it is worth remembering that established technologies may have considerable advantages due to experience built over many years.
For example, the foil-type strain gauge is based on well-established scientific principles(2)(3) and have been enhanced by continuing technological advances. Foil-type strain gauges are simple to install and are very low cost even for individual and singe solutions.
Strain gauge transducers provide incredible accuracy, very high long-term stability and good bandwidth suitable for rapid measurements. Passive resistive networks can easily adjust most remaining errors in transducer manufacturing. Strain gauge based transducers are the best choice for most large-scale but also individual and single industrial tasks and especially for high precision measurements. The high levels of accuracy facilitate the tracing of mechanical quantities up to national and international level (10)(11)(12).
In more mainstream applications the simplicity and low cost of foil-based strain gauges make their use significant in core markets such as load cells of all types ranging from retail up to truck scales.
 Survey “World Emerging Sensors Markets”, Sensors & Instrumentation, No. M678-01, Frost and Sullivan, 23 Mar 2011, U.S.A.
 A. C. Ruge “Strain response apparatus” Patent application no. 2322319 to the United States Patent Office; 16. Sept. 1939, approved 22. June1943
 K. Hoffmann “An Introduction to Measurements using Strain Gauges” Publisher Hottinger Baldwin Messtechnik , Darmstadt, Germany
 A. Schäfer, “Analogy observation of force transducers compared to strain and pressure transducers based on foil type strain gauges and the piezoelectric principle“, Proceedings of Asia-Pacific Symposium on Measurement of Mass, Force and Torque, Tokyo, Japan, 2009
 A. Schäfer, “Force, strain and pressure transducers based on Foil Type strain gauges as well as the piezoelectric principle for the use in industrial applications” Proceedings of “Eurosensors 2008”, Dresden, Germany, 2008
 T. Kleckers “Force sensors based on strain gages and piezoelectric crystal-based force transducers in mechatronic systems — a comparison” Proceedings of "Sensor+Test" Conference, Nurnberg, 2011
 A. Schäfer, et al. “A new type of transducer for accurate and dynamic pressure measurement up to 15000 bar using foil type strain gauges”, XVII IMEKO World Congress 2003, Metrology in the 3rd Millennium, Dubrovnik, Croatia
 T. Kobata; W. Sabuga et al “Final Report on Supplementary Comparison APMP.M.P-S8 in Hydraulic Gauge Pressure from 100 MPa to 1000 MPa”, The Asia-Pacific Metrology Programme (APMP) and the European Association of National Metrology Institutes (EURAMET) 1000 MPa , Hydraulic pressure inter-laboratory comparation, 2010
 A. Schäfer “Answers to the need of higher orders of magnitude for pressure, force and torque measurement explained on the example of wind energy” IEEE I2MTC Conference, Mai 2012, Graz, Austria
 A. Schäfer, Examples and proposed solutions regarding the growing importance of calibration of high nominal forces IMEKO 2010 TC3, TC5 and TC22 Conferences, November 22-25, 2010, Pattaya, Chonburi, Thailand
 H. Gang, Z. Zhang and Y. Zhang „Internal Large Force Comparison in China”, Mechanics and Acoustics Division, National Institute of Metrology, Beijing, P. R. China, Proceedings of Asia-Pacific Symposium on Measurement of Mass, Force and Torque, Tokyo, Japan, 2009
 P.D. Hohmann and A. Schäfer, “Combined Calibration of Torque and Force in a 3 in 1 Calibration unit”, “APMF 2000”, Proceedings of Asia-Pacific Symposium on Measurement of Mass, Force and Torque, pp. 204, Tsukuba, Japan, 2000