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Weigh Modules Offer Simple Solutions for 100% In-Process Control

Check dimensions, coatings, shapes, or completeness while looking at weight deviations

Published: Tuesday, July 31, 2012 - 11:50

(Mettler-Toledo: Columbus, OH) -- New high-resolution weigh modules from Mettler-Toledo offer surprisingly fast and simple solutions for 100-percent in-process control. They can be used to check completeness of parts, kits, or modules as well as quality of surfaces where material is added or subtracted.

Mettler-Toledo now offers a white paper that explains how weigh modules are applied for in-line testing with high throughput rates. Traditional methods for in-process control and end-of-line control use electrical resistance, optical imaging, spectrometry, light beam, and mechanical sizing. It wasn’t until recently that weighing technology was used in spot-checking mode. This was mostly due to the design of traditional balances and scales, which didn’t fit seamlessly into machines and instruments. It also wasn’t obvious that dimensions, coatings, shapes, or completeness could indirectly be checked while looking at weight deviations or differences.

High-resolution weigh modules from Mettler-Toledo are very compact. They can be seamlessly integrated into various machines and instruments. In an automated process, a weigh module can detect violations of weight tolerance of 1 ppm in a split second. This high measurement speed enables 100-percent inspection without sacrificing high throughput. Although lighting and positioning of the part doesn’t matter, this method is suitable for complex shapes, hidden structures, material inconsistency, as well as transparent or reflective materials.

Standards like ISO/TS 16949 and ISO 9001 require periodic testing of quality control devices. The test frequency must be in accordance with the risks related to the respective control process. Weigh modules are tested with traceable weights to comply with the above mentioned standards. This procedure is easy and inexpensive. In addition, most weigh modules have a built-in calibration weight. This allows for automatic verification of function and precision, plus adjustment if necessary, at any time.

Download the white paper, “Fast and Reliable In-Process Control” here.


About The Author

Mettler-Toledo’s picture


Originally known for weighing technologies, today Mettler-Toledo International Inc. is a recognized leader in the research and development of products and services in communications, optics, robotics, and other technologies as well as software to integrate these technologies into powerful laboratory, industrial, and retail solutions. Mettler-Toledo offers the most comprehensive range of services in the precision instrument industry on a global level. It is a pioneer in the field of automated chemistry and in developing automatic, accurate, dimensioning and data capture technologies for the transportation/logistics industry.