In 1987, Duane Brown and Dr. Andrew Dunn (Former Group Leader of the Electrical Standards Group of NRCC) founded Measurements International Ltd. Duane Brown has been involved in Metrology since 1972 when he started his career at Guildline Instruments where he worked for 14 years. Measurements International (MI) was started on June 17, 1987, in Prescott, Ontario, Canada. For the first two years, Dr. Dunn gave courses in Metrology, and Duane Brown gave courses on the Guildline 9975, 9920, and how to make good resistance measurements.
MI has seen its main headquarters in Prescott, Ontario, Canada grow, but also the creation of the offices in MI USA in Orlando, Florida (1993), MI Europe in Czech (2005), MI China (2010) in Beijing, the newly created MI India (2012), and MI Japan (2015). This has allowed MI to facilitate the need and demand in the market segment. In 1990, Measurements International developed and marketed the first fully automated resistance bridge, the Model 6010A. This is one of the most significant developments in the field of resistance metrology, providing laboratories with faster and more repeatable measurements while reducing the influences of human operator error. Since then, Duane has established an MI resistance bridge as the primary resistance measuring device in nearly every national laboratory in the world.
Through years of research and design, Measurements International has brought the accuracy of the commercial resistance bridge from 0.2 ppm down to
below 0.02 ppm.
Measurements International was the first company to introduce automation to the resistance metrology field; the first products introduced were low thermal scanners for semi automating resistance measurements using the manual bridges.
In 1990, MI was contacted by NRCC to automate products such as the High Voltage Divider, The Transimpedance Amplifier, the Watt Transducer and the Power Calibration System. In 1992, MI developed the model 2100A Power Calibration System for calibrating single phase wattmeters to an accuracy of less than 20 ppm. Since then MI has delivered systems up to 200 A and 600 volts mainly to NMI’s worldwide.
In 1993, Measurements International was contracted by Sandia National Laboratories in Albuquerque, NM, to give a course on the manually operated DC Resistance Bridge and making good resistance measurements. It was during this time that Duane was able to present the MI philosophy and product direction to Sandia personnel. Shortly after that, he was contacted by Sandia regarding the development of an automated resistance system to replace the manual bridges
In 1994, the first Model 6010A with 20 channel matrix scanner was successfully delivered to Sandia. In 1998, Sandia again contacted MI about developing a 2000 A shunt measurement system which was delivered in 1999. During this period, Sandia produced a technical paper on the comparison of the automated bridge to the data they had collected using the manual bridge titled “Intercomparison of Decade Resistance Values Between 0.0001 Ω and 10,000 Ω as Measured on an Automated Binary Current Comparator, and on a Manual Current Comparator and a Double Ratio Set”. The paper was presented by Marlin Kraft at the NCSL Conference 2001.
Since its early beginnings, MI has become one of the industry’s most active developers in metrology equipment for the field of resistance, voltage and temperature. While over the last 10 years, MI has made its mark in the AC Power and Transformer Measurement Industry. “Customers of the highest level of measurement come to MI to satisfy their metrology needs, we are grateful for this and are happy to be able to provide leading edge solutions to fulfill those needs,” said Mr. Ryan Brown, Vice President of Measurements International.