Accession Number : AD0429545


Title :   DESIGN STUDY TO DEVELOP INSTRUMENTATION FOR FIELD EVALUATION OF CHEMICAL AGENTS.


Descriptive Note : Monthly progress rept., Jan 64,


Corporate Author : SOUTHERN RESEARCH INST BIRMINGHAM ALA


Personal Author(s) : Bird,Alvin N ,Jr


Report Date : 17 Jan 1964


Pagination or Media Count : 5


Abstract : Measurements were made to obtain information concerning the operation of the cell when some of the variables were changed, specifically, variables which affect the cell response time and output. The platinized Pt electrode was re placed by various materials in an effort to decrease the cell response time. The only other electrode offering any promise was Ag. A new electrochemical cell should be ready for evaluation during January. This cell was designed with replaceable parts so that variables such as oxime flow, electrode spacing, and electrode materials could be changed easily. Aerosol Flash Camera: A circuit was added to widen the video pulse produced by the very small particles. The height, or amplitude, of the pulse is unchanged so the number of TV lines intercepted still gives an accurate indication of the particle size. By this method particles that intercept as little as one TV line can be counted. The ability to count one TV line should make it possible to count 5-micron particles with 20% error with only 4X magnification. (Author)


Descriptors :   *ELECTROLYTIC CELLS , *SAMPLERS , *COUNTING METHODS , TEST METHODS , INSTRUMENTATION , VIDEO SIGNALS , CIRCUITS , PARTICLE SIZE , CAMERAS , AEROSOLS , ELECTRODES , PLATINUM , SILVER , NITROGEN , NITROGEN COMPOUNDS , OXIMES


Distribution Statement : APPROVED FOR PUBLIC RELEASE