DF-1 Series Specifications

Notable Features:

State of the art microprocessor electronics
Flowrate and volume totalizations displayed are corrected to a factory settable Reference Temperature and Pressure (4 options available)

Reference and ambient flow conditions are operator selectable.
Flowrate accuracy ±4% of full scale
Elapsed time meter
Auto zero calibration feature of flow sensor
100-120 VAC, 50/60 Hz; single phase
220V Units available
RS-232 Communication Port w/operator selectable download frequency for real-time data
Storage of elapsed time and volume in the event of power outage
Auto Shut-off on time or volume

Choice of flow / volume units:

SCFM	SCF
SLPM	SL
SCMH	SCM

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

GENERAL DESCRIPTION:
The Model DF-1E 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-1E 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).