• Patent

Portable air sampling systems including non-intrusive activity monitor and methods of using same

Citation

Lawless, P. (2000). IPC No. U.S.Portable air sampling systems including non-intrusive activity monitor and methods of using same (Patent No. 6105440.)

Abstract

Portable air sampling systems and methods are provided for intermittently sampling air in the breathing zone of a person over extended periods of time. Air sampling system performance can be continuously measured and recorded within a data logger. In addition, physical activity levels of a person wearing a portable air sampling system can be continuously monitored and recorded within the data logger. Air sampling system performance monitoring includes measuring pressure drop across a filter and measuring temperature of air flowing through the filter. Physical activity levels of a person can be monitored easily and non-intrusively by measuring changes in electrical capacitance of a transducer maintained in close proximity to the person.