Since 1967, CLIMET INSTRUMENTS COMPANY has manufactured particle counters. CLIMET has provided a track record of customer inspired innovation in technology and design; providing reliable and functional products to validate and monitor airborne particles in controlled production enviroments (cleanrooms classified from 1 to 300,000). CLIMET currently holds seven patents in the field of particle count with each product incorporating one or more of these innovations. CLIMET has pioneered portable full-featured particle counters by introducing; the stainless steel enclosure, battery operation and significant reductions in instrument size and weight. These innovations have not come at the cost of performance as the battery-operated products provide sensitivities of airborne particles from 0.1 to 0.3 microns.