About us

Making clean air accessible to all

We're on a mission to provide safe industrial workplaces by simplifying dust monitoring.

Our background

From startup to NASA

Applied Particle Technology (APT) was founded by Jiaxi Fang, Tandeep Chadha and Pratim Biswas during their PhD studies in Energy, Environmental and Chemical Engineering at Washington University in St. Louis, Missouri.

Right out of the gate, APT won the Earth and Space Air Prize Competition, chosen by NASA and the Robert Wood Johnson Foundation (RWJF). APT was chosen from over 20 finalists for excellence in developing new air quality sensor technologies.

Becoming a North-American leader in air quality monitoring

With hundreds of sensors deployed for customers like Teck Resources and Vulcan Materials, Applied Particle Technology has quickly grown from a promising startup to a leader in air quality monitoring. APT has tested their technologies with the EPA, NIOSH, and South Coast Air Quality Management District to ensure reliable and accurate air quality data.

By integrating advanced monitoring systems and AI-driven analytics, APT provides companies with tools to operate more effectively and responsibly, leading to cost savings, improved productivity, and enhanced health and safety measures.

APT is now at the forefront of developing robust, efficient sensors for air quality monitoring to protect people from harmful airborne pollutants

Deployed APT sensors in North America

We partner with the best in the industry

APT’s technology helps our facilities pinpoint our silica exposures, reducing our risks and improving operational efficiencies in real time. We now have a level of insight we didn't know was possible, making this technology critical for our health and safety team.

Brian Holen

3M, Industrial Minerals Products Division

With shift average samples, we don't know what's contributing to exposures. But using APT's real-time particulate monitoring, we're able to understand which tasks contribute the most to their exposure, and justify with data where we need to put our money and effort.

Health & Hygiene Manager

Leading Canadian mining company

If we go over the limit, APT alerts us.We get notifications via texts or email that we can set at different parameters. I know our primary crusher is always reading a little high. Some days it's right at the trigger point where I'll get the additional notification, so I visually verify and talk to our plant operator [to address the issue].

Environmental Manager

Major producer of construction aggregates

The ability to respond instantly to risks using real time data has been a huge improvement for our operations.


3M, Industrial Minerals Products Division

Leadership team

Jiaxi Fang

Chief Executive Officer

Dr. Jiaxi Fang is the Co-Founder and CEO of Applied Particle Technology. During his time as the CEO, Dr. Fang has worked with institutions like the NIOSH, NASA, and the EPA to develop new technologies for monitoring exposures, including winning the NASA Earth Space Air Prize competition.

He obtained his PhD from Washington University in St. Louis from the Aerosol and Air Quality Research Laboratory in 2016. He is also an active member of the National Stone Sand and Gravel Association, American Industrial Hygiene Association, and Society for Mining, Metallurgy & Exploration.

Tandeep Chadha

Chief Technology Officer

Dr. Tandeep Chadha is the Co-Founder and CTO of Applied Particle Technology. As the CTO, Dr. Chadha worked on the development and commercialization of aerosol sensing and containment technologies. This includes serving as a Principal Investigator (PI) on a NASA SBIR Phase I and subsequent contract for the development of a particulate monitor for lunar dust measurement.

Dr. Chadha earned his PhD in Energy, Environmental and Chemical Engineering from Washington University in St. Louis. He is also an active member of the American Industrial Hygiene Association, and Society for Mining, Metallurgy & Exploration

Pratim Biswas

Chief Scientific Officer

Professor Pratim Biswas is the Dean of the University of Miami College of Engineering and a faculty member in the Departments of Chemical, Environmental, and Materials Engineering. He is recognized for pioneering aerosol science and engineering, impacting areas like energy nanotechnology, solar energy, and air pollution control.

A fellow of AAAS and the National Academy of Engineering, he previously held key positions at Washington University. Biswas has received numerous awards, published over 450 journal articles, and graduated 60 PhD students. As Dean, he has developed a strategic vision to address global challenges through engineering.

Better decisions through real-time insights