The TEOM® 1405-F Ambient Particulate Monitor with FDMS is a mass
measurement monitor that incorporates the patented Tapered Element
Oscillating Microbalance (TEOM) to measure particulate matter mass
concentrations continuously. The TEOM 1405-F Monitor is a true
“gravimetric” instrument that draws ambient air through a sample filter for
collection at a constant flow rate. The monitor continuously weighs the
filter calculating near real-time mass concentrations.