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 |
|
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
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
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 |
Abstract |
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) |
Notes |
Cover title. "Prepared for: Environmental Health Service, National Air Pollution Control Administration ..." "May 1970." "Contract CPA 22-69-83." Includes bibliographical references. |
Place Published |
St. Paul, Minn. |
Corporate Au Added Ent |
United States. National Air Pollution Control Administration.; Thermo Systems, Inc. |
PUB Date Free Form |
1970 |
BIB Level |
m |
Medium |
unmediated |
Content |
text |
Carrier |
volume |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20190829063819 |
Language |
eng |
Origin |
OCLC |
Type |
MERGE |
OCLC Rec Leader |
01274cam 2200349Ka 45010 |