A division of Venturedyne Ltd., and in operation since 1962, Climet is engaged in the manufacture of environmental monitoring instrumentation for cleanrooms and similar controlled and regulated environments.Climet introduced the CI-500 in 1993, and was the first particle counter to meet the JIS 9921 standard for calibration accuracy. In 2008, ISO 21501-4 was ratified, which was a virtual mirror image of the JIS standard. Upon its ratification, Climet was the only manufacturer of particle counters that did not have to re-design its instrument. To the contrary, Climet was meeting the ISO 21501-4 standard nearly 15 years before its ratification.