DF-1 Series Specifications

Notable Features:

Display in Metric or English units to be set at factory.
State of the art electronics
Flowrate and optional volume totalizations corrected to STP
Bright LED display
Flowrate accuracy ±4% of reading
Elapsed time meter
Auto zero calibration feature of flow sensor
100-120 VAC, 50/60 Hz; single phase
220V Units available
Optional RS-232 Communication Port
Optional Electronic Volume Totalization Meter

Available flow / volume units:

SCFM	SCF
SLPM	SL
scc/min	scc
sm³/hr	sm³

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Model: DF-1 110V
Model: DF-1E 220V

GENERAL DESCRIPTION:
The Model DF-1 portable air sampling system with a digital flowmeter is a low-volume air sampler consisting of an oil-less, carbon vane vacuum pump, with a constant air flow regulator for use where a nearly constant air flow is desirable. The regulator holds a constant pressure drop across an in-line orifice by varying the flow through a bypass valve into the pump. This system allows the pump to work at a minimum pressure drop at all times, permitting it to run cooler, thus extending its service life. The oil-less pump requires no lubrication to maintain optimal efficiency during its service life. The pump is mounted on a base with four rubber feet. A handle is provided on the chassis to facilitate transportation.

The DF-1 Portable Air Sampling System is designed for continuous indoor use. Please consult the product specifications for the design temperature range and the installation category. Standard product displays flow rate and elapsed time

The typical operating flow range is 0.5 to 4.3 CFM (14 – 122 LPM).