A cleanroom is a controlled environment that has a low level of pollutants such as gas, dust, airborne microbes, aerosol particles, and chemical vapors. A cleanroom has a controlled level of contamination.
The quality of air within a cleanroom is critical. Whether it be for the manufacturing of pharmaceutical products, for operating theatres or sterile services departments there is a legal obligation to have a qualified validation team certify the cleanroom is at the acceptable level and ISO class.
A more complex form of contamination is often referred as airborne molecular contamination (AMC) or air cleanliness by chemical concentration (ACC). The contamination mechanism is fundamentally different, since molecular contamination often includes chemical reactions on surfaces. In addition to yield related problems, many of the AMC chemicals also can have adverse health effects even at very low levels.
By combining cantilever technology with laser spectroscopy it is possible to measure e.g. NH3 and HF simultaneously below 1 ppb level with very high specificity and minimal interference from other gaseous species. The small volume of the measurement cell combined with chemically resistant materials enables very rapid gas exchange and thus quick response time, which is often very difficult when handling reactive chemicals. Read more about GASERA ONE here.