DF-604 Digital High Volume Air Sampler

NOTABLE FEATURES:

Display in English or metric units set at factory
Choices of flow/volume units:
sccm scc
SLPM SL
SCMH SCM
SCFM SCF
State of the Art microprocessor electronics
Automatic flow control
Auto Shut-off on time or volume
Flowrate and volume totalizations displayed at actual conditions or corrected to STP is operator selectable
Elapsed time meter
Auto zero calibration feature of flow sensor
Bright LED display
Flow rate accuracy within ± 4% F.S.
RS-232 Communication Port w/Operator selectable download frequency for real-time data
110 – 120 VAC, 50/60Hz; single phase

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GENERAL DESCRIPTION:
The DF-604 Series Air Sampling Systems are designed for remote unattended continuous air sampling applications. The DF-604 Series Air Samplers feature a brushless motor with electronic motor speed control that maintains a user selectable flow rate. The flowrate range attainable through the filter media is dependent upon the air porosity of the filter media. The DF-604 Series design accommodates rapid field service and component replacement.

The basic components of the system are assembled in a modular fashion so that each component can be readily and independently removed for service.

For durability and weather resistance, the system is housed in a freestanding powder coat painted aluminum enclosure. The sample air is drawn in under the eaves of the hinged lid from all four sides and is exhausted near the bottom of the enclosure. The locking swing door on the enclosure provides convenient access for servicing the equipment inside. A lockable latch on the top cover restricts unauthorized tampering with the filter holder.

The electronic flow control measurement sub-system of the DF-604 Series provides STP flow measurement and constant airflow that is operator selectable through the filter medium. The air flow is measured by a precision-machined differential pressure sensor. The controller can be readily set to any sampling flow rate between 5 to 50 CFM (141 to 1415 LPM) depending on the filter paper air resistance and dimensions. The bright LED readout displays air sampling information including current flow rate, current elapsed sample time and totalized volume. The filter holder can be custom designed to accommodate any filter size and type. The DF-604 model utilizes a 4 inch (102 mm) diameter filter.