BASIS™ Small Flow Controllers and Meters

Compact MEMS Thermal Mass Flow Meters and Controllers

These small mass flow controllers and small mass flow meters offer the performance of a premier product for processes with space constraints. These devices fit in the palm of your hand but are built to last.

  • Accurate flow control in a compact, durable, metal flow body
  • Run sophisticated flow-control scripts using a fast, robust Alicat ASCII command set
  • Dispense doses and batches with built-in totalizer
  • Switch between 9 gases: air, N2, O2, CH4, He, H2, Ar, CO2, N2O
  • 0.1-100% of full scale measurement and control range (1,000:1 turndown)


100 SCCM – 100 SLPM


0 – 145 PSIA

Small MEMS thermal BASIS mass flow meters and controllers from Alicat for small footprints.

Compact Mass Flow Meters, Controllers, and Manifolds

BASIS-2 flow controller

BASIS Meters

Compact flow measurement

3.75″ max width

  • ± 1.5% reading accuracy (gas-dependent)
  • ± 0.25% reading repeatability
  • 0 – 50°C operating temperature
  • 1 minute warm-up

Spec Sheets


BASIS Controllers

Compact flow control

4.52″ max width

  • All the benefits of BASIS Meters
  • Integrated proportional control valve
  • As fast as 100 ms control response
  • Easy automation

Spec Sheets

BASIS-2 channel gas mixer

Compact Manifolds

Save space with multiple devices

Manifold or gassing module

  • Built to your process
  • Easily connect to PC or PLC
  • Wide range of fittings

    Build Options

    Communication Protocols
    RS-232 Serial
    RS-485 Serial
    (4-20 mA or 0-5 Vdc)
    Modbus RTU (over RS-232 or RS-485)
    Process Connections
    NPT or SAE
    Ingress Protection



    BASIS Meters and Controllers Operating ManualLatest – BASIS 2

    BASIS Controllers Operating ManualLegacy – BASIS


    BASIS Brochure


    FlowVision 2.0

    Serial Terminal Utility

    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.


    Gas chromatography column inside a GC analyzer

    Verify flow and optimize carrier gas control in gas chromatography

    Enable full system stability. Fluctuations in flow rate disrupt the detection of chemical compounds. Tightly regulate carrier gas flow rate to ensure accurate compound detection, using a BASIS electronic mass flow controller.

    Glass manufacturing requires high precision mass flow controllers

    Ensure consistent batches in glass production

    BASIS mass flow devices are used in burner control applications to control gases that heat the glass and facilitate drawing. Scripting and electronic control make your process repeatable and precise. Great for production of lab-quality and other high-volume, low-variability glass.

    Bioprocessing mass flow controller

    Lowering cost and increasing speed of biologics production

    Ensure your process is repeatable and scalable.  BASIS provide accurate and responsive gas flow with a large turndown ratio and integrated gas selection.  The number of spares required is reduced without sacrificing performance.

    mixing fluids

    Gas mixing in molar ratios

    Use BASIS mass flow controller’s intuitive serial commands to make gas mixtures in molecular proportions, and stop paying premiums for custom mixes.

    FastTrack Ordering

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


    2 SCCM - 500SLPM


    2 SCCM - 100SLPM

    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.

    7641 N Business Park Dr. Tucson, AZ 85743

    Geograaf 24
    6921 EW
    Duiven, The Netherlands