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Alicat Basis 2.0 - OEM Gas Mass Flow Controller

  • 9 field selectable gases including Air, N2, O2, CH4, He, H2, Ar, CO2 and N2O
  • Full scale flow range of between 100 SCCM and 20 SLPM
  • Exceptional accuracy as low as ±0.2%f.s or ±1.5% of reading

The BASIS Mass Flow controller range focuses on providing accurate and fast flow control.

Flow ranges and Measurable gases

Full scale flow ranges 100 SCCM to 20 SLPM with a measurement and control range of 0.1% to 100% of full scale (1000:1 turndown). Nine user-selectable gases are stored internally and this allows it to be used in a variety of industries such as producing consistent batches in glass production and mixing gases in molar ratios. The fully field selectable gases included are Air, N2, O2, CH4, He, H2, Ar, CO2 and N2O.

Accuracy and Repeatability

Accuracy of the device is gas dependent on gas but is as good as either ±1.5% of the reading or from ±0.2% of full scale. Flow repeatability is also excellent at ±0.25% of reading or ±0.05% of full scale. Control response times can be as fast as 100ms. A range of flow control scripts can be programmed using the ASCII command set and dosing and batching can be achieved through an built-in totalizer.

Process connections and Outputs

  • Digital communications to Basis 2.0 OEM mass flow controllers is either over RS-232 or RS-485. Analog outputs are also available, either 0 – 5 VDC or 4 – 20 mA.
  • Process connections range from 1/8” NPT female or SAE 4 up to 3/8” NPT female or SAE 6 depending on full scale flow.
  • Additional valve overrides exist for valve hold and valve exhaust, standard valve is a normally closed valve (NC).
  • Each device features a stats LED to indicate power, serial activity or error state.

Basis 2.0 technical diagram

Basis 2.0 mass flow meter technical diagram

To view the full specifications please refer to the PDF spec sheet in the 'Data sheets and manuals' section.

Temperature and Pressure

Devices are rated to a maximum pressure of 12 barg. The ambient and gas temperature range is between 0 and 50°C with a maximum humidity of 95% that is non-condensing. It has an ingression protection rating of IP 40 and has a maximum pressure drop off of 850mbar for controllers.

Customisation is available

Standard models are available with full scale flow ranges of 100/ 200 / 500 SCCM and 1 / 2 / 5 / 10 / 20 SLPM. Custom full scale flow ranges are also available as well as manifold options. Talk to us today about your customer flow requirements, or start online by clicking the Configure now button below:


Common process applications and industrial uses include:

  • Verify flow in carrier gas in gas chromatography
  • Lowering costs and increasing speed in biologics production
  • Consistent batches in glass production
  • Gas mixing in molar ratios

Other features

  • Small and light footprint from 22.23mm x 68.6mm x 39.4mm @ 116 grams
  • RS-232 or RS-485 digital communications
  • 0 - 5 VDC or 4 - 20 mA analog output
  • 6 Pin JST GH electrical connection


The Alicat Basis 2.0 - OEM Gas Mass Flow Controller is widely used in the following industries:

Alicat recalibration service

Alicat Calibration and Service Centre

We provide a certified annual recalibration service on all Alicat mass flow meters and mass flow controllers. Further details on our recalibration service.

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