
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
Smallest 1 CFM Particle Counter Launched
Stoughton, MA – February 14, 2018– Particles Plus has launched a new 0.3 µm remote particle counter that is the world’s smallest for a 1 CFM flow rate. The extremely small dimensions for this new 1 CFM remote particle counter allows it to fit in to most OEM...
2018 Indoor Air Quality Association Conference
Chicago, IL – January 22, 2018– The Particles Plus Team was on hand at the Hilton Chicago for the 2018 Indoor Air Quality Association Conference and the AHR Exposition at McCormick Place. Particles Plus was highlighted as the Diamond Sponsor for the event for a second...
On Screen Annotations
Stoughton, MA – December 15, 2017– Particles Plus is highlighting their on-screen Annotation feature, a unique method for recording notes associated with specific air sample records. The Particles Plus instruments all share a common user interface, providing easy...