An instrument built on deep atmospheric science, advancing toward widespread scientific availability.
RepliClouds brings together hardware engineering and world-class expertise in atmospheric physics and cloud microphysics.
Driving the commercialisation, engineering execution, and strategic groundwork to bring RepliClouds to market as an independent deep-tech company.
Dr. Mayur G. Sapkal
Project Lead
Dr. Mayur is the Project Lead of RepliClouds. An engineer and climate scientist by training, he holds a Bachelor's in Mechanical Engineering, a Master's in Atmospheric and Space Sciences, and a doctorate in Cloud Microphysics from ETH Zurich. Before moving into climate research, Mayur worked in the industrial manufacturing sector on production planning, quality control, and process optimization, experience he now uses to ensure RepliClouds instruments are built for real-world deployment.
The HCCNC was built during his doctoral work at ETH Zurich, where he managed the device's design, fluid dynamics modeling, and lab validation before leading the patent filing along with its co-inventors. Now supported by the prestigious ETH Pioneer Fellowship, he bridges the gap between scientist and entrepreneur. In this dual role, he leads the technical development of the next-generation HCCNC version while driving the business strategy and market push required to bring this measurement technology to the global scientific community.
The co-inventors of the HCCNC, alongside senior atmospheric scientists, providing ongoing independent scientific guidance to RepliClouds.
Dr. Zamin A. Kanji
Scientific Advisor
Dr. Zamin Kanji is a senior scientist and lecturer at ETH Zurich's Institute for Atmospheric and Climate Science, where his group studies the physicochemical properties of aerosols and their role in cloud formation. His laboratory has developed and deployed a number of custom atmospheric instruments, including the Zurich Ice Nucleation Chamber (ZINC), the Horizontal Ice Nucleation Chamber (HINC), and its autonomous successor, HINC-Auto.
Zamin is a co-inventor of the HCCNC. He has been involved in the instrument's development from the beginning and continues to advise on its scientific scope and validation.
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Prof. Ulrike Lohmann
Scientific Advisor
Prof. Ulrike Lohmann has been Full Professor of Atmospheric Physics at ETH Zurich's Institute for Atmospheric and Climate Science since 2004, and Vice Rector for Doctoral Studies since 2023. Her research focuses on aerosol–cloud interactions, mixed-phase clouds, and cloud radiative effects. She served as Lead Author on the IPCC Fourth and Fifth Assessment Reports, and her contributions to the field were recognised with the 2025 EGU Vilhelm Bjerknes Medal.
At RepliClouds, she serves as Host Professor and Scientific Advisor, providing guidance on the broader atmospheric physics context and the scientific positioning of the HCCNC.
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Dr. Michael Rösch
Technical Advisor
Dr. Michael Rösch is an atmospheric instrumentation specialist whose expertise spans cloud microphysics, aerosol measurement, and the engineering of precision systems for real-world scientific deployment. At ETH Zurich, he serves as Technical Specialist for Atmospheric Physics Group, where he develops, tests, and maintains complex atmospheric measurement systems for both laboratory and field use. His background includes more than 15 years of experience in atmospheric aerosol measurements, alongside deep technical expertise in CAD, additive manufacturing, automation, and design for manufacturing.
At RepliClouds, Michael provides technical leadership on the engineering realization of the HCCNC. As a co-inventor of the HCCNC, he has contributed directly to the instrument's core hardware architecture. His advisory role ensures that RepliClouds' systems are engineered for flawless precision, extreme field durability, and dependable, automated operation.
Read Profile at ETH Zurich ↗Grounded in Global Academic Excellence
