Model DF-14M

Mobile Low Volume Air Sampler

with Digital Flowmeter

Model DF-14M Mobile Low Volume Air Sampler

The Model DF-14M cart mounted mobile low volume air sampler with digital flowmeter has an adjustable, aluminum sampling gooseneck. The adjustable gooseneck permits sampling at heights varying from 4 ft to 7 ft above floor level. Model DF-14M contains state of the art microprocessor electronics, which provides for corrected flow rate measurements, volume totalizations, and an RS232 communications port. It features a large bright LED display. The DF-14M Air Sampler includes an oil-less, carbon vane vacuum pump with a constant airflow regulator for use where a nearly constant airflow 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 lifetime. The oil-less pump requires no lubrication to maintain optimal efficiency during its service life. The pump is mounted on a mobile cart with two rubber wheels to permit mobile transportation of the unit. The DF-14M Air Sampler is designed for indoor use.
The typical operating flow range is 0.5 to 4 CFM (14 to 115 LPM).

DF-14M Digital Low Volume Air Sampler Specifications (110-120VAC)

Pump Type: Oil-less, carbon vane ¼ HP, 1725 RPM @ 60 Hz
Maximum Capacity: 4 CFM (115 LPM) @ 0” Hg Pressure drop
Ultimate Vacuum: 25” (635 mm) Hg @ sea level
Power Requirements: 110-120VAC; 50/60Hz; 6 amperes, single phase
Circuit Breaker Protection: 10 amps
Electrical Cord: All temperature, 3 wire, 14 gauge
Thermal Overload Protection: Furnished as an integral part of the motor
Constant Airflow Regulator: Aluminum construction with silicone diaphragm; adjustable from 0.5 to 4 CFM (14-115 LPM)
Dimensions: 18”L×15”W×4’ – 7’H (46×38×122 - 213 cm)
Weight: 67 lbs. (30,4 kg)
Installation Category: Pollution Degree 2
Operating Temp. Range: 32º to 104ºF (0º to 40ºC)
SSampling Gooseneck: Adjustable 4’ to 7’ (122 cm – 213 cm) sturdy aluminum
Wheels: 8 in., hard rubber
Electronic Specifications
Measurement Accuracy:
Air flow ± 4% of full scale
Temperature ± 2ºF (1,1ºC)
Barometric Pressure
2% over measured range
Calibration: Factory calibration 1 per year
Communications Interface: RS-232 serial port
On-board Calculations:
Flow calculation from differential pressure value suing best fit curve method
Flow correction for standard temperature and pressure Auto-zero correction utilizing electro-pneumatic method to compensate for offset and drift (automatic, once
every minute)
Options: Data Storage Device (P/N: 232FCDSD)
1 GB Secure Digital Card (P/N: 372239)
Flash card Reader (P/N: SDDR-199-A20)

Combination Filter Holders Available:

FJ-05P F&J Model B 2 in. or 50 mm Diameter
FJ-21P F&J Model C 2 in. or 50 mm Diameter
FJ-35P F&J Model B 47 mm Diameter
FJ-46P F&J Model C 47 mm Diameter
FJ-51P F&J Model M 2 in. or 50 mm Diameter
FJ-53P F&J Model M 47 mm Diameter