Products » Gas Flow » Mass Flow Controller » Whisper MCW Low Pressure Drop Mass Flow Controllers

Whisper™ MCW Series Controllers

Low Pressure Drop Mass Flow Controllers with Laminar Differential Pressure Technology

Low pressure drop mass flow controllers from Alicat

Low pressure drop mass flow 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
Configurations available for bidirectional control of flow
As a low pressure drop mass flow controller, you can control flow and measure invisibly. Won’t consume a low pressure differential.
Limited Lifetime Warranty

Operating manuals, brochures, software, and utilities →

Full Scale Flow Ranges

0.5 SCCM – 1,000 SLPM

OPERATING PRESSURE RANGE

11.5 – 60 PSIA

Request a Quote

Ask an Engineer

Looking for a mass flow meter instead?

Alicat Low Pressure Drop Mass Flow Controller

MCW Series Controller

For gas control with low pressure drop

fast proportional control

0.5 SCCM – 1,000 SLPM options
60 PSIA max operating pressure
Accuracy as good as ± 0.6% of reading or ± 0.1% of full scale, whichever is greater
0.5 – 100% of full scale control range (200:1 turndown)
30 ms control response

Spec Sheets

Alicat Low Pressure Drop Mass Flow Controller with Bi-directional flow

MCDW Series Controller

For bi-directional flow applications

Control in both directions

0.5 SCCM – 500 SLPM options
60 PSIA max operating pressure
Accuracy as good as ± (0.4% of total span from positive full scale to negative full scale)
0.5 – 100% of full scale control range (200:1 turndown)
100 ms control response
Controls pressure in a closed volume, measures flow rate (leak checking)

Spec Sheets

0.5 SCCM to 500 SLPM



Available Variants

MC Series Controller

Our standard laminar DP MFCs

SFF / MCV Series Controller

Control gas at vacuum pressures, SEMI footprint options

IS-Max Series Controller

Intrinsically safe MFC for explosive atmospheres

Build Options

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 (default) or TFT color; integrated or panel-mount; none

Process Connections

10-32, NPT, SAE, BSPP, VCRM, VCO, Compression

Ingress Protection

IP40 (default); IP66, IP67

Hazardous Environment Ratings

For explosive environments, see the IS-Max Series

Humid Gases

Relative humidity compensation

FastTrack Flow & Pressure Devices

Alicat instruments built and shipped just 3 – 5 business days from your order.

Alicat instruments built and shipped just 10 – 15 business days from your order.

CALIBRATION

Standard or High Accuracy

DISPLAY

Monochrome, Color, or None

PROTOCOL

Analog, RS-232, RS-485, Modbus RTU, PROFIBUS, EtherNet/IP, EtherCAT, MODBUS TCP/IP, or PROFINET

CONNECTOR

MD8, Locking Industrial, DB9M, DB15

FITTINGS

NPT

FLOW METER RANGES

2 SCCM – 500 SLPM

FLOW CONTROLLER RANGES

2 SCCM – 100 SLPM

PRESSURE METER RANGES

1 – 100 PSI

SINGLE AND DUAL VALVE PRESSURE CONTROLLER RANGES

1 – 100 PSI

Do FastTrack instruments meet your requirements?

FASTTRACK QUOTE

Ready for the final details?

Each product is made-to-order.  Alicat’s Applications Engineers are ready to provide expertise and discuss custom options, ensuring the best fit for your needs.

Ask an Engineer

Downloads

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

