DL-22V.2 Low Volume Air Sampler

NOTABLE FEATURES:

Data storage up to 60 days
RS-232 Communication Port
Display in English or metric units
Microprocessor controlled electronics
Flow rate measurement and volume totalizations corrected to Standard Temperature and Pressure
Various selectable sampling modes
Precision machined venturi flow sensor
Auto zero calibration feature of flow sensor
Multiple on-board calculations with display
Flow rate accuracy within +/- 2.5% of full scale
Programmable chain of custody identification
Optional data communications package
110 – 120 VAC, 50/60 Hz; single phase
Certified to UL and CSA electrical safety standards by ITSNA (formerly ETL or Edison Testing Laboratories)

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GENERAL DESCRIPTION:
The Model DL-22 Air Sampling System is a microprocessor controlled 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 head 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 removable base plate, which can be secured within the WH-3 weatherhouse.

The typical operating range is 0.5 to 4 CFM (14 – 115 LPM).