Portable air sampling systems and methods are provided forintermittently sampling air in the breathing zone of a person overextended periods of time. Air sampling system performance can becontinuously measured and recorded within a data logger. Inaddition, physical activity levels of a person wearing a portableair sampling system can be continuously monitored and recordedwithin the data logger. Air sampling system performance monitoringincludes measuring pressure drop across a filter and measuringtemperature of air flowing through the filter. Physical activitylevels of a person can be monitored easily and non-intrusively bymeasuring changes in electrical capacitance of a transducermaintained in close proximity to the person.
Portable air sampling systems including non-intrusive activity monitor and methods of using same
Lawless, P. (2000). IPC No. U.S. Portable air sampling systems including non-intrusive activity monitor and methods of using same. (Patent No. 6105440).