MC gas flow controllers use laminar differential pressure technology to measure flow rates faster and more precisely than other methods. Features multivariate reporting & easy control using backlit display or analog/digital communication protocols. They offer high performance & steady flow using an integrated proportional valve for ultra-fast control response.
- Laminar DP (differential pressure) mass flow measurement technology
- Instant accuracy with no warmup
- Ultra-fast control response time as low as 30 ms
- Measures mass flow, volumetric flow, temperature, and pressure
- 98-130 pre-loaded gas calibrations - switch without losing accuracy
- Measurement and control range as high as 0.01 – 100 % (10,000:1 turndown)
- Limited Lifetime Warranty
Full Scale Flow Ranges
0.5 SCCM-12,000 SLPM
Operating Pressure Range
11.5-160 PSIA
MC Series Controller
Alicat’s flagship controller
Fast proportional control

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- 11.5-160 PSIA operating
- As fast as 30 ms control response
- 0.01-100 % control range (10,000:1 turndown)
- 0.5 SCCM full scale to 12,000 SLPM full scale options
- Accuracy as precise as ± 0.5 % of the reading or ± 0.1 % of the full scale, depending on which value is greater
MCS Series Controller
Corrosion-resistant flow control
Reduced Wetted Materials

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- Control range spans from 1 % to 100 % of the full scale
- Up to 130 calibrations for both corrosive and non-corrosive gases are preloaded
- 0.5 SCCM full scale to 12,000 SLPM full scale options are available
- The accuracy can reach ± 0.4 % of the reading and ± 0.2 % of the full scale
MCQ Series Controller
Control gas flow at higher pressures
Highest pressure rating

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Accuracy as precise as ± 0.6 % of the reading or ± 0.1 % of the full scale, depending on which value is greater10 SCCM full scale – 12,000 SLPM full scale options.
- 11.5-320 PSIA operating
- 100 ms control response
- 0.5-100 % of full-scale control (200:1 turndown)
MCD Series Controller
Control flow in two directions
Bidirectional Flow Control

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Accuracy as precise as ± 0.5 % of the reading or ± 0.1 % of the full scale, depending on which is greater
- 11.5 - operating at 160 PSIA
- 0.5 SCCM full scale - options for 3,000 SLPM full scale
- Reference specifications for MC, corrosion-resistant MCS, low-pressure drop MCW, or high-pressure MCQ. While performance remains consistent, dimensions will vary with the inclusion of a valve.
MCT Series Controller
Switch between two gas streams
Two Sources, One Device

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Accuracy as precise as ± 0.5 % of the reading or ± 0.1 % of the full scale, depending on which is greater
- 0.5 SCCM full scale - options available up to 3,000 SLPM full scale
- Operating range of 11.5 - 160 PSIA
- Reference specifications for MC, corrosion-resistant MCS, low-pressure drop MCW, or high-pressure MCQ. While performance remains consistent, dimensions will vary with the inclusion of a valve.
Available Variants
MCW / MCWD Series Controller
The MCW/MCWD Series Controllers are low-pressure-drop laminar DP MFCs.
SFF / MCV Series Controller
Control gas under vacuum pressures, SEMI footprint choices.
IS-Max Series Controller
Intrinsically safe MFC for explosive atmospheres.
Build Options
Source: Alicat Scientific, Inc.
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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 |
CSA Class 1 Div 2, ATEX Class 1 Zone 2; uses Legacy – 8v firmware (2020) manual For explosive environments, see the IS-Max Series controllers. |
| Humid Gases |
Relative humidity compensation |
| Measurement Technology |
Laminar differential pressure (laminar DP) flow sensing with temperature and pressure correction. |