Mass photometry

Weighing molecules with light

A revolutionary new technology

Mass photometry is a revolutionary new method of analysing molecules. It enables the accurate mass measurement of single molecules in solution, in their native state and without the need for labels.


This approach opens up new possibilities for bioanalytics and research into the functions of biomolecules.

The mass photometer

  • High-fidelity measurements of molecular mass


  • Minimal quantities of sample required for analysis

  • Intuitive acquisition and data analysis software 

  • Easy setup – a compact, benchtop instrument with minimum installation requirements

Refeyn TwoMP.png

For molecular mass measurements with unmatched sensitivity, speed and simplicity of use. The second-generation mass photometer, the Refeyn TwoMP, offers wider mass range, and improved resolution and statistics.

Our team

The opportunity around our unique technology has attracted a passionate team of people who collectively have spent decades developing and commercialising microscopes and other analytical instrumentation.

Click below to learn about our team and view career opportunities.

About us

Refeyn pioneers mass photometry technology, producing a disruptive new generation of analytical instruments. Spun out of Oxford University in 2018 to share its technology globally, Refeyn is transforming biomolecular characterisation across academia and industry.


By clicking Submit you will be subscribed to our mailing list and will receive occasional updates from Refeyn. Your address and personal information will be stored securely. We will not sell or share this information with anyone.