Xylem Analytics Blog

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  • 1/27/2025
  • Dr. Andreas Eich

Ubbelohde viscometer: Precision in viscosity measurement

Ubbelohde viscometers are available in different versions, which are described in ISO 3105. Xylem manufactures SI Analytics® brand viscometers according to DIN 53000-1 and ASTM D445, including micro Ubbelohde viscometers for small sample volumes and special designs such as TC viscometers for automatic thermoelectric detection. These viscometers are named after Leo Ubbelohde, who applied for a patent for this type of viscometer in 1932. more

  • 1/13/2025
  • Dr. Markus Hoffmann

Introduction into Photometric Measurement

Photometric measurement methods have a long history and have been used for over a century. Its roots go back to the 19th century, when the first basic measurement methods were developed. Today, photometry is an integral part of many scientific disciplines, including biology, chemistry, engineering, and pharmacy. It is used in environmental analysis, medical diagnostics and quality control in industry and, along with pH measurement, is one of the most important measurement methods in analytics.more

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