Alicat Scientific

MW Whisper Series Low Pressure Drop Mass Flow Meters

High-accuracy, multivariate flow measurement with minimal system impact

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MW Whisper Series Low Pressure Drop Mass Flow Meters 03749

The MW “Whisper” series mass flow meters with low pressure drop are the perfect instruments for measuring mass and volumetric flow rates. Low pressure drop minimizes system impact, enabling flow measurement at near-atmospheric pressures or when there is little available system pressure. A very wide usable flow range and on-board calibrations for multiple gases will keep this flow meter in operation for a long time. The MW is also available in a battery-powered portable configuration (MWB).

Alicat’s MW “Whisper” series mass flow meters feature dual digital and analog communications by default and can be ordered with Ethernet/IP, EtherCAT, DeviceNet, Profibus or Modbus (RTU and TCP/IP) communications for easy integration into your digital industrial or laboratory network.  Other build options include your choice of display, process connections, elastomeres as well as performance options.  Need further customization?  Contact us and we’d be happy to help you build the instrument you need.

Each flow meter comes with a NIST-traceable calibration certificate and an Alicat operating manual.  Power supply sold separately. 

• Low pressure drop minimizes system impact
• Enables flow measurement at near-atmospheric pressures or when there is little available system pressure
• Measures mass flow, volumetric flow, line pressure, and line temperature
• Over 30 on-board user selectable gas calibrations
• Fully-functional digital display with push button controls
• 200:1 turndown ratio
• Equipped with multiple analog outputs
• Quick response time of < 10 ms
• User-selectable engineering units
• Digital and analog outputs
• Multiple build and performance options
• NIST traceable
• Lifetime warranty

Maximum Available Range0 - 1000 slpm
Minimum Available Range0 - 0.5 sccm / 0 - 500 sμlm
Turndown Ratio200:1
Standard Accuracy Calibration+/- (0.8% of the reading + 0.2% of FS)
Optional High-Accuracy Calibration+/- (0.4% of the reading + 0.2% of FS)
Repeatability0.2% of FS
Typical Measurement Response Time5 - 10 ms
Compatible Gases98
Operating Temperature-10°C - 60°C
Max Internal Pressure (Static)45 PSIG (60 PSIA)
Max Differential Pressure (Inlet to Outlet)15 PSID
Proof Pressure175 PSIG (190 PSIA)
STP/NTP Default25°C & 1 atm STP/0°C & 1 atm NTP
Ingress ProtectionIP40
Wetted Materials303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Reinforced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, Silicon, Glass

• Monitoring and recording bioreactor output

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