Single gas (elemental or a mixture)

Easily control the flow of one gas: constant flow or a pre-programmed flow profile with unlimited steps and ramps for any duration. The software shows flow as mass, as volume in any standard volumetric unit as well as customer specified volumetric unit (custom pressure and temperature).

Mixture of two or more gases

FlowSeg software can control any number of devices so the made mixture is not limited in number of components, or dilution ratio. The software device also supports re-dilution, so making extreme dilutions without using large amounts of diluting gas is possible.

The software calculates and shows the partial pressure of all mixture components, so designing a mixtures and segment programs is easy. These changing values are logged on screen and on disk with timestamps.

Steam, pH₂O, or evaporating other fluids

Any low viscosity fluid can be added to gas stream, and is evaporated (by default) with heat. Most typical uses are pH₂O control and steam generation. The system is suitable from ppm levels to high throughput of steam, even at elevated pressures. In other words 0 to 100% RH with infinitely finite resolution.

Ratios and flows

It is possible to maintain ratios between components A & B while changing the ratio component C. Likewise it is possible to change internal ratios while maintaining the total flow, or vice versa.

Dual atmosphere use

The software can control two (or more) separate sets of devices, thus making two (or more) mixtures simultaneously. This is useful for testing fuel cells, electrochemical gradients and gas permeation where the process of interest lies in between of two distinct conditions.

• Fuel cells One typical use is in supplying fuel and oxidant to the two sides of a fuel cell test. The oxidant can be diluted and is supplied directly dry or wetted and led to the anode. The fuel can be started and the cathode reduced if necessary in a soft manner by starting with inert gas only at the anode and then mixing in fuel gradually. The software allows easy inverting of gases if necessary. Dry H₂-containing gases are reducing and may embrittle and reduce components. Safe and stable operation is obtained by wetting the H₂ mixture fully, but also the oxidant can be humidified. This is a good option for work with proton conducting fuel cells.
  
  
• Gas permeation Supplying different gases over a membrane sample, analysis for example with mass spectrometer (MS) or Gas chromatograph (GC) of the gas after the membrane passage on the feed or permeate side is used to obtain the permeation of species in the gases.One species may describe leak while another species permeation, so designing and accurately controlling the mixtures uses is important. Humidifying the feed gas may also be important.