Portable air sampling systems including non-intrusive activity m

Details Portable air sampling systems including non-intrusive activity m Portable air sampling systems including non-intrusive activity m

1999-03-16

2000-08-22

Raevis, Robert

Measuring and testing

Sampler, sample handling, etc.

With constituent separation

7386434, G01N 100

Patent

active

061054402

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.

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