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Main Title Development of a piezoelectric microbalance for continuous measurement of aerosol mass concentration /
Author Oli, John G. ; Se, Gilmore J. ; Christenso, Dale L. ;
Other Authors
Author Title of a Work
Olin, John G.
Sem, Gilmore J.
Christenson, Dale L.
CORP Author Thermo Systems, Inc., Minneapolis, Minn.
Publisher Thermo-Systems Inc.,
Year Published 1969
Report Number PB-193 362
Stock Number PB-193 362
OCLC Number 58653505
Additional Subjects ( Air pollution ; Monitors) ; ( Piezoelectric gages ; Balances) ; ( Balances ; Design) ; Piezoelectric crystals ; Electrostatic precipitation ; Aerosols ; Particle size ; Sampling ; Reliability(Electronics) ; Particle mass concentration
Library Call Number Additional Info Location Last
ELBD ARCHIVE EPA 950-K-70-011 AWBERC Library/Cincinnati,OH 06/06/2023
NTIS  PB-193 362 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 29 unnumbered leaves : illustrations ; 28 cm
A piezoelectric aerosol particle mass concentration monitor has been constructed and tested. This instrument detects, with high time resolution, the actual mass concentration of an aerosol cloud. The instrument uses an electrostatic precipitator to deposit aerosol particles directly onto a piezoelectric quartz crystal microbalance. The piezoelectric microbalance system consists of a quartz crystal detector, a reference crystal, two oscillator circuits, a frequency mixing circuit, and readout equipment. The electrostatic precipitator has an advantage over impaction collection devices because it collects the total mass of most aerosols on the crystal surface. It is not subject to a lower particle size cut-off within the range of most natural aerosols. A digital readout automatically indicates actual mass concentration in units of micrograms per cubic meter. Applications of the instrument include automobile particulate emissions monitoring, industrial hygiene measurements, ambient outdoor particulate mass concentration monitoring, industrial process control and source monitoring. The complete instrument is compact, allowing hand-carrying for fast, on-site measurement of particle mass loadings. (Author)
Cover title. "Prepared for: Environmental Health Service, National Air Pollution Control Administration ..." "May 1970." "Contract CPA 22-69-83." Includes bibliographical references.