888-290-6060 info@alicat.com Alicat Store CN
+1 888-290-6060 info@alicat.com CN

+31 262-031-651 europe@alicat.com CN

Alicat Scientific Logo

Whisper™ Series

Low Pressure Drop Mass Flow Meters and Controllers

Low pressure drop mass flow meters and controllers are ideal for systems with limited source pressure. Instruments create minimal pressure drop (as low as 0.07 PSID).

  • 98 pre-loaded gas calibrations – switch without losing accuracy
  • Measures mass flow, volumetric flow, temperature, and pressure
  • Instant warm-up
  • 0.01-100% measurement range (10,000:1 turndown)
  • Laminar differential pressure (DP) mass flow measurement technology
  • Limited Lifetime Warranty

FULL SCALE FLOW RANGES

0.5 SCCM – 1000 SLPM

OPERATING PRESSURE RANGE

11.5 – 60 PSIA

Available variants

Standard (M/MC), Corrosive-Resistant (MS/MCS), Portable (MB/MWB)
Request a Quote
Operating Manual
Brochure
Mass flow meter 100 SCCM

Low Pressure Drop Mass Flow Meters and Mass Flow Controllers

Low pressure drop Whisper meters from Alicat Scientific for processes with limited pressure sources near atmospheric pressure.

MW Series Meter

For most low pressure flow measurement

most versatile

  • 0.5 SCCM- 1000 SLPM options
  • 60 PSIA max operating
  • ±0.6% of reading accuracy
  • ±(0.1% of reading + 0.02% of full scale) repeatability

Spec Sheets

    Standard mass flow gas meter

    MCW Series Controller

    For most gas control

    Fast proportional control

    • 0.5 SCCM- 1000 SLPM options
    • 60 PSIA max operating
    • ±0.6% of reading accuracy
    • 0.5–100% of full scale control range (200:1 turndown)
    • 30 ms control response

    Spec Sheets

      Mass flow controller for bi-directional flow applications

      MCDW Series Controller

      For bi-directional flow applications

      Control in both directions

      • 0.5 SCCM – 500 SLPM options
      • 60 PSIA max operating
      • ±0.6% of reading accuracy
      • 0.5–100% of full scale control range (200:1 turndown)
      • 100 ms control response

      Spec Sheets

      Build Options for Mass Flow Meters and Mass Flow Controllers

      Communication Protocols
      RS-232 Serial (default)
      RS-485 Serial
      Analog       (4-20 mA, 0-10 Vdc, 0-5 Vdc, or 1-5 Vdc)
      Modbus RTU (over RS-232 or RS-485)
      Modbus TCP/IP
      DeviceNet
      EtherCAT
      EtherNet/IP
      PROFIBUS
      PROFINET
      IO-Link
      Displays
      Backlit monochrome or TFT color; integrated or panel-mount
      Process Connections
      10-32, NPT, SAE, BSPP, VCRM, VCO, Compression
      Ingress Protection
      IP40 default; IP66, IP67
      Humid gases
      Relative humidity compensation
      Ask a question

      Downloads

      Manuals

      Whisper™ Series Operating ManualLatest – 10v firmware

      Download

      MW Series Operating ManualLegacy – 8v firmware (2020)

      Download

      MW Series Operating ManualLegacy – 9v firmware (2021)

      Download

      MCW Series Operating ManualLegacy – 8v firmware (2020)

      Download

      MCW Series Operating ManualLegacy – 9v firmware (2021)

      Download

      Brochures

      Whisper™ Series Brochure

      Download

      Software/Utilities

      FlowVision 2.0

      Download
      LabVIEW Driver LibraryLatest – Compatible with LabVIEW 2014+
      Download
      LabVIEW Driver LibraryLegacy – Compatible with LabVIEW 2010
      Download
      LabVIEW Driver LibraryLegacy – Compatible with LabVIEW 8.0
      Download

      Serial Terminal Utility

      Download

      Serial Address Dump Utility

      Download

      Serial Port Troubleshooter Utility

      Download

      Python Library

      Download
      CODA coriolis mass flow meter

      Liquid Flow

      Liquid flow controllers use either Coriolis or laminar flow technology to accurately control liquid flows across a wide range of applications.

      Dual valve pressure controller 5 PSIG

      Pressure Instrumentation

      Alicat offers pressure controllers for use in flowing, dead-ended, or vacuum applications.

      Custom Instrumentation

      Order mass flow controllers and meters custom-build to your specific application needs.

      Technical Reference

      Find guides, tutorials, pinout diagrams, and industrial protocol resources for your Alicat instrument.

      Applications

      Aerospace SpaceX test mass flow controllers

      Valve leak testing for space exploration

      Diagram explaining how gas changes moving from a higher pressure to a subatmospheric pressure.

      Measuring flow at sub-atmospheric pressures

      Bioprocessing mass flow controller

      Simplified leak testing for single-use bioprocessing

      Smog and environmental pollution

      Measuring vent and greenhouse gas emissions

      FastTrack Ordering

      M/MC mass flow meters and controllers that ship in just 3-5 business days.
      CALIBRATION
      Standard or High Accuracy
      DISPLAY
      Monochrome, Color, or None
      PROTOCOL
      Analog, RS-232, RS-485, or Modbus RTU
      CONNECTOR
      MD8, Locking Industrial, DB9M, DB15
      FITTINGS
      NPT

      METER RANGES

      2 SCCM - 500SLPM

      CONTROLLER RANGES

      2 SCCM - 100SLPM

      Order Instruments

      Service and Support

      Whether it is time for your instrument’s annual recalibration or your instrument needs a repair or upgrade,
      you can fill out the Service Request Form below, email us, call us, or start a live chat session to get the service process started.

      Service Request Form