- Model FJ-28B - Low Volume Air Sampler (110V)

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F&J - Model FJ-28B - Low Volume Air Sampler (110V)

Model FJ-28B is counter-top cabinet model, low-volume air sampler with a 1/4 HP oil-less carbon vane vacuum pump, and a constant air flow regulator for use where a near 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 by 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 FJ-28B unit may be used in enclosed areas or placed in a weather resistant aluminum cabinet for environmental sampling. The typical operating flow range is 0.35 to 3.5 CFM (10-100 LPM).

Notable Features

  • Constant air flow regulator adjustable
  • Easy access powder coat painted enclosure with exhaust fan
  • Durable 1/4 HP oil-less carbon vane pump designed for continuous use
  • Internal intake and exhaust mufflers
  • Rotometer, elapsed timer indicator and vacuum gauge
  • 110-120VAC, 50/60Hz; single phase


  • PUMP TYPE: Oil-less, carbon vane 1/4 HP; 1725 RPM
  • MAXIMUM CAPACITY: 4 CFM (113 LPM) at 0” Hg Pressure drop
  • ULTIMATE VACUUM: 25” (635 mm) Hg at sea level
  • VACUUM GAUGE: 0 – 30” (0 – 762mm) Hg
  • POWER REQUIREMENTS: 110 - 120VAC; 50/60 Hz at 6 amperes; single phase
  • FUSE PROTECTION: 6 ¼ Amperes
  • ELECTRICAL CORD: All temperature, 3-wire, 16 gauge
  • THERMAL OVERLOAD PROTECTION: Furnished as an integral part of the motor
  • ELAPSED TIME INDICATOR:Resettable type-0-9999.9 min. or hours
  • CONSTANT AIR FLOW REGULATOR: Aluminum construction with silicone diaphragm; adjustable from 0.35 to 3.5 CFM (10-100 LPM)
  • DIMENSIONS: 18 ½”L×12 ½”W×13 ¾”H (47×28.2×34.9 cm)
  • WEIGHT: 43 lbs. (19.5 kg)
404 Cypress Road
Ocala ,  FL 34472


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