A handheld particle counter is a pocket-sized portable device used for measuring and monitoring air quality through detecting airborne particles and counting them. It is most often found in cleanrooms and manufacturing facilities, as well as on HVAC systems. This instrument gives accurate readings on particle concentration levels for industry compliance. Equipped with an advanced sensor and real-time monitoring feature, it identifies contaminants and monitors air quality. Handheld particle counters are lightweight, easy to use, and often come with different detection ranges and sizes for various dimensions of particles. That makes them handy pieces of equipment for environmental professionals and industrial hygienists. They are fully contained in a user-friendly design and are among the most accurate devices. Thus, handheld particle counters deliver completely reliable safety and cleanliness in critical workspaces.