Particle Measuring Systems (PMS) is the largest particle counter manufacturer in the world where it sets the standard for cleanroom contamination monitoring.

PMS product line consists of Airborne Particle Counters for air and gas are specifically designed for controlled and cleanroom environments, Liquid Particle Counters that are essential for critical contamination monitoring and measurement of ultrapure water and pure process chemicals, Microbiological active air samplers which are an essential component for compliance with ISO 14698, Compressed Gas Particle Counters are looked at as critical utilities in many industries, whether in direct product contact or used in the greater cleanroom environment, and finally Molecular Monitors for detecting acids, amines, ammonia, and chlorides, helping you quickly identify problems and their location before your product is contaminated.