Flow Meters

Both DDU and APSD data can be severely compromised if the inlet flow rate (the flow rate at the entrance to the induction port or DUSA) used during testing is inaccurate and/or inconsistent, generating discrepancies with regard to its effects on both the cascade impactor itself and the inhaler under test. Copley offers flow meters solutions with the required range and accuracy to measure the flow in inhaler testing systems.

Flow Meter DFM 2000

Operating on the basis of thermal mass principle, the Flow Meter model DFM 2000 has a range of 200 L/min, a resolution of 0.01 L/min between 0 and 90 L/min (0.1 L/min between 90 and 200 L/min) and an accuracy of +/- 2% of flow rate. Fitted with temperature and pressure sensors, the DFM 2000 is able to calculate the ambient volumetric flow rate and can also be used in-line (with supplied inlet filter).

  • High accuracy

  • Volumetric mode: Calculation of flow rate base on live T/P conditions

  • Portable, hand-held device

  • Standard mode: Calculation of flow rate based on pre-set T/P conditions

DFM 2000 Features
Operation Principle
Hot-Wire Mass Flow Principle
Flow Rate Range
0 – 200 L/min
0.1 L/min from 90 to 200 L/min
+/- 2% of reading
Volumetric Flow Calculation
Accurate calculation from in-built T & P sensors
Inlet Filter
Required in unfiltered laboratory environments
Interface to external devices such as the BAC 100i and TPK 100i
RS-232 (flow rate and calibrate data)
Factory calibration only
Use ‘in-line’
Can be used ‘in-line’ (for non-pharmacopoeial methods)
Power Source
Universal mains input voltage

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