RESEARCH AND DEVELOPMENT OF AN AUTOMATIC BERYLLIUM-IN-AIR MONITOR

摘要

In improved model beryllium-in-air monitor has been con¬structed, calibrated and tested in the laboratory. Significant improvements include optimization of the air sample system design and elimination of the temperature instability of critical electronic parts. A concentration of 25 micrograms per cubic meter beryllium-in-air requires 4 minutes for reliable alarming, a low level concentration of 2ug beryllium requires 60 minutes. Sensitivity, alarm reliability and response time are all dependant primarily upon the construction of the alpha source. Other characteristics of the device and instrument design have been optimized.