Stable gas flow control for analytical instruments

Gas mass flow controllers are key components in many analytical techniques, like mass spectrometry, chromatography, atomic spectroscopy and combustion analysis. As an example: compact gas flow instruments are for feeding gases to a collision cell (reaction cell) as part of an ICP-MS setup.

The FLEXI-FLOW gas mass flow controller is a perfect fit for these processes, demanding stable gas flow control, compactness, short- and long-term stability and compatibility with used gases.

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Wide gas compatibility

The FLEXI-FLOW gas flow controller is an instrument that is applicable for a wide range of different gas types. And suitable for analytical desktop instruments that have a low gas flow rate, like 1-1000 ml_n/min of process gas and up to 20 l_n/min of cooling gas (like Argon or Nitrogen).
 

Repeatable and long-term stable flow control

In analytical equipment, a carrier gas flow directly influences the measurement result. For example, the retention time of a substance in the column of a chromatograph directly depends on the stability of the flow. When the flow fluctuates, so does the measurement. The FLEXI-FLOW features short- and long-term control stability and gives the same performance today as one year later. 

Fast switching of low gas flows

The FLEXI-FLOW can switch fast between different gases, which is an important feature for feeding gases to a collision cell, as part of an ICP-MS setup.
In these collision cells, unwanted compounds react with an additional gas in order to eliminate them. Switching of gases is then necessary. When measuring low flow rates, in the range of 1-10 ml_n/min, the switching time is related to the internal volume of the mass flow controller. As the FLEXI-FLOW is very compact, the response time is shorter then a few seconds.

Compactness

The small size of the FLEXI-FLOW will make it a device of choice for compact benchtop analytical instruments.

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