F&J Model DF-1 Portable Low Volume Air Sampler With Digital Flow Meter

GENERAL DESCRIPTION:
The Model DF-1 portable air sampling system with a digital flowmeter is a 
low-volume air sampler consisting of oilless, carbon vane vacuum pump, with a 
mechanical 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 oilless 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, elapsed time 
and totalized volume by operator selection.
The typical operating flow range is 0.5 to 4 CFM (14 – 115 LPM).

STANDARD FEATURES:
• Digital display
• Flowrate and volume totalizations displayed are corrected to a factory 
settable Reference Temperature and Pressure (4 options available)
Classical STP 0ºC, 760 mmHg
Normal T and P 20ºC, 760 mmHg
Modified Normal T and P 21°C, 760mmHg
Standard Ambient T and P 25ºC, 760 mmHg
• Reference and ambient flow conditions are displayed
• Elapsed time meter 
• Storage of elapsed time and volume in the event of power outage
• Auto Shut-off on time or volume
• Choices of flow/volume units:
SLPM SL
SCMH SCM
SCFM SCF
• Display in English or metric units set at factory
• 2nd Generation State of the Art microprocessor electronics
• Auto zero calibration feature of flow sensor
• Flow rate accuracy within ± 4% F.S.
• 100 – 120 VAC, 50/60Hz; single phase 
• Internal Data Storage Downloadable as (.csv) file
• Data download via Type A USB port wired connection or 
 through Bluetooth with optional Bluetooth Dongle for PC Device