The DF-604DTE Series Air Sampling Systems are designed for remote unattended continuous air sampling applications. The DF-604DTE Series Air Samplers feature a brushless motor with electronic motor speed con-trol that maintains a user selectable flowrate. The flowrate range attainable through the filter media is depend-ent upon the air porosity of the filter media. The DF-604DTE 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 ser-vicing 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-604DTE Series provides a standard flow measurement and a constant flow of air 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 value within the calibrated flow range depending on the filter paper air resistance and dimensions. The bright LED readout displays multiple air sampling information including current flow rate, current elapsed sample time and total-ized volume. The filter holder can be custom designed to accommodate any filter size and type. The DF-604DTE model utilizes a 102 mm (4 inch) diameter filter.
