Thermo Scientific 8500 FDMS Filter Dynamics Measurement System0 pages

Product Specifications

True mass measurement,
conditioning system for theThermo
Scientific TEOM® series monitors

Thermo Scientific
8500 FDMS Filter Dynamics
Measurement System

Key Features
•

Accounts for nonvolatile and volatile
PM components with innovative selfreferencing methodology

•

Hourly mass concentration average
updated every six minutes

•

Scientifically validated – total mass
of aerosol chemical species

•

California Approved Sampler (CAS),
PM-2.5 and PM-10 regulations

The Thermo Scientific 8500 FDMS Filter
Dynamics Measurement System
accomplishes the challenging task of
accounting for both the volatile and
non-volatile components of particulate
matter (PM), and reporting the combination
as a mass concentration result. This is
done by measuring the volatile portion of
the sample independently from the total
incoming sample, and using this fraction in
calculating the PM mass concentration.
The sampling and measurement system of
the 8500 FDMS® is based upon a number
of successful technologies applied by
Thermo Scientific, including the true-mass
filter-based TEOM® microbalance, a
diffusion drying system, and a selfreferencing technique to assess the volatile
component of ambient PM.

The FDMS 8500 system provides a new PM
measurement approach that offers the
ability to quantify the PM mass
concentration as it exists in ambient air.
The FDMS 8500 system takes into account
the dynamics of PM that have been
deposited on a sample collection filter, and
how that material behaves over time. The
device is designed to provide high-quality,
representative PM mass concentration
readings for both short-term averages (one
hour) as well as 24-hour averages. The
system’s basic output consists of running
1-hour average mass concentration (in μg/
m³) of PM-10, PM-2.5 or PM-1 updated
every six minutes. The unit also computes
the base mass concentration and reference
mass concentration over the same
averaging times.