An Improved Portable Instrument for Continuous Monitoring of Ambient Particulate Concentrations.
Litton-CD; Hertzberg-M; Graybeal-L
The unique design of a cylindrically concentric ionization chamber having a center electrode of gold-covered americium 241 was used in the development of a portable instrument for continuous monitoring of ambient particulate concentrations and for obtaining particle size distributions. Originally designed for the detection of spontaneous combustion in underground mines, the instrument has exhibited a much higher sensitivity than was anticipated. As a result, the instrument is presently undergoing a critical laboratory evaluation to determine the feasibility of using it for continuous ambient particulate monitoring.
ACS, 1978, Proc. 4th Conf. on Sensing of Env. Pollutants, New Orleans, 11/6-10/77, PP. 712-715