Nanotechnology Project

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Environment, Health and Safety Research

Direct Reading Instrument Metrology

Project Information

Principal InvestigatorJudith Hudnall
InstitutionNational Institute for Occupational Safety and Health
Project URLView
Relevance to ImplicationsHigh
Class of NanomaterialGeneric
Impact SectorHuman Health
Broad Research Categories Safety
Risk Management
NNI identifier

Funding Information

Anticipated Total Fundingn/a
Annual Fundingn/a
Funding SourceNIOSH
Funding MechanismIntramural
Funding SectorGovernment
Start Year
Anticipated End Year


Accurate measurement of indoor and industrial contaminants generated by current technology and emerging nanotechnology is an important component of occupational and environmental hygiene practice. Direct reading instruments are frequently used to determine the effectiveness of engineering controls and the quality of indoor air. The study assesses the effects of temperature, humidity, and concentration on commercially available direct-reading instruments. Other concerns are the uncertainties associated with standard factory calibrations. The results of this study are revealing limitations and opportunities for improvements in current instrumentation and will be valuable in choosing appropriate direct-reading instruments for use in field evaluation of industrial and other ventilation systems.