the size and size distribution of molecules and particles in the submicron region, with the latest technology measuring less than nm. it is typically used to characterise particles, emulsions or molecules dispersed or dissolved in a liquid. the zetasizer series measures from less than nm to several...
measuring instrument that measures pressure in a vacuum (i.e., in a vessel operating at sub-atmospheric pressure). depending on the type of vacuum system (fig. ) and the required operating vacuum level, different vacuum gauges [...] vacuum valves – types and operation vacuum valves are an essential...