What you need to know to utilize their full potential
When personal monitoring pumps first appeared in the 1950s, they were simple devices, designed for the rugged task of airborne dust monitoring in underground coal mines. By the mid-1970s, designs had become more complex, with flow control systems to maintain the flow rate more accurately. By the end of the decade, two types of flow control systems emerged aimed at two distinctly different goals. These control systems are known generically as constant flow control and constant pressure control. Understanding the differences between these two basic control formats allows us to access the full potential of todayâ€™s personal sampling pumps.