
Count On Us™
Particles Plus offers a line of advanced-technology particle counters, air quality monitors, and environmental sensors. As the most vertically integrated particle counter manufacturer and technology licensing company in the industry, Particles Plus engineers and manufactures its own counter, display, battery, vacuum pump, and sensor technology from the ground up. Added intelligence in each module results in products with superior performance, extended features, accuracy, quality, reliability and value.

The most accurate sensor and particle counting technology on Earth


Made in USA
100% of Particles Plus® products are designed and assembled in the USA, while 89.2% of the parts are built by 35 different suppliers located in the USA and Canada.
Latest News
Revolutionizing Particle Counting Design Through Advanced Simulations
Boston, MA – November 10, 2020 – Particles Plus, Inc., an engineering and manufacturing company located in Stoughton, Massachusetts, sought to apply computational fluid dynamics (CFD) and single-particle tracking simulations to analyses of the flow-field within a...
Aerosol Science Significance for COVID
Reston, VA– October 8, 2020 – The American Association for Aerosol Research conducted a virtual press conference to share insights on the airborne spread of the novel coronavirus. The conference was presented by a professional panel of aerosol researchers who shared...
Oregon Wildfires Affecting Air Quality
Tillamook, OR – September 9th, 2020 – Wildfires raging across the state of Oregon have displaced over 500,000 residents and are creating hazardous breathing conditions throughout the Pacific Northwest. Particles Plus Sales Manager, Jim Akey, resides in the coastal...