- Model DF-804-30-NOV - High Volume Enzyme Dust Air Sampling Systems



The DF-804-30-NOV high volume enzyme dust air sampling systems are designed for remote unattended continuous air sampling applications. The DF-804-30-NOV Series Air Samplers feature a brushless motor with electronic motor speed control that maintains a user selectable flow rate. The flowrate range attainable through the filter media is dependent upon the air porosity of the filter media. The DF-804-30-NOV Series design accommodates rapid field service and component replacement.

The basic components of the system are assembled in a modular fashion so that each component can be readily and independently removed for service.

For durability and weather resistance, the system is housed in a freestanding powder coat painted aluminum enclosure. The sample air is drawn horizontally into the filter holder from all four sides and is exhausted near the bottom of the enclosure. The locking swing door of the enclosure provides convenient access for servicing the equipment inside.

The electronic flow control measurement sub-system of the DF-804-30-NOV Series provides a standard flow measurement and a constant flow of air through the filter medium. The air flow is measured by a precision-machined differential pressure sensor. The controller is typically set to a sampling flow rate between 5 and 22 CFM (141-650 LPM) depending on the filter paper air flow resistance and dimensions. The bright LED readout displays multiple air sampling information including current flow rate, current elapsed sample time and totalized volume. The filter holder can be custom designed to accommodate any filter size and type. The DF-804-30-NOV model typically utilizes a 15 cm diameter filter.

  • Display in English or metric units set at factory
  • Choices of flow/volume units:
    • SLPM: SL
    • SCMH: SCM
    • SCFM: SCF
  • State of the Art microprocessor electronics
  • Automatic flow control
  • Auto Shut-off on time or volume
  • Flowrate and volume totalizations displayed are corrected to a factory settable Reference Temperature and Pressure (4 options available)
  • New G2 clam shell type sample head
  • Elapsed time meter
  • Auto zero calibration feature of flow sensor
  • Bright LED display
  • Flowrate accuracy within ± 4.0% F.S.
  • RS-232 Communication Port w/Operator selectable download frequency for real-time data
  • 110 – 120 VAC, 50/60Hz; single phase

  • Performance: Basic components of the system are modular and independently serviceable. Sample flow rate can be set between 5 and 22 CFM (141 and 650 LPM). Filter holder is a 15 cm diameter standard for enzyme dust collection. Other flow rate ranges are available.
  • Technology: Microprocessor controlled state of the art electronics
  • Operating Temperature Range: 0ºF to 122ºF (-18ºC* to 50ºC)
  • Operating Relative Humidity: 0 – 95% RH
  • Typical Flow Rate Range: 5 – 22 CFM (141 to 650 LPM)
  • (Depending on filter paper dimensions and air resistance).
  • Motor: Brushless: 1 H.P.(800 Watt) motor with electronic motor speed control
  • Power: 110-120VAC; 50/60Hz; 10 amperes; single phase.
  • Housing: Powder coat painted aluminum Locking swing door with key
  • Dimensions: 26”H × 26.5”W × 16.5”D (66 cm ×67 cm × 41cm)
  • Weight: Approximately 60 lbs. (27,2 kg)
  • Shipping Weight: Approximately 100 lbs. (45,5 kg)
  • Installation Category: Pollution Degree 3
  • Enclosure Rating: IPX3
  • Automatic Flow Control: The system microprocessor monitors flow rate relative to the preset flow rate corrected to a reference T and P or to ambient conditions established during the setup procedure and electronically adjusts the electronic motor speed adjustment, if necessary, to maintain the flow within ± 4% of setting. The microprocessor computes the reference or ambient flow rate by correcting for temperature and pressure.


  • Temperature of air flow through system
  • Inlet pressure to the flow sensor
  • Differential Pressure of the flow sensor


  • Totalized volume
  • Current flow rate
  • Elapsed time

Factory Settable Reference T and P

  • Classical STP 0ºC, 1 ATM
  • Normal T and P 20ºC, 1 ATM
  • Modified Normal T and P 70ºF, 1 ATM
  • Standard Ambient T and P 25ºC, 1 ATM

Other System Features:

  • Automatic shut off of system on totalized volume or elapsed time
  • RS-232 port for real-time data download
  • Utilization of 15 cm diameter filters
  • Bright LED display
  • Automatic flow control


  • Data Storage Device (P/N: 232FCDSD)
  • 2 GB Secure Digital Card (P/N: 372239)
  • Flash card Reader (P/N: SDDR-199-A20)

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