Gas Blenders

A gas blender produces a precise, repeatable mixture of two or more gases on demand, at the point of use, instead of relying on pre-mixed cylinders. ASTG builds ultra-high-purity blending systems for applications where the composition has to be exact and consistent every time: semiconductor process gas, laboratory and research work, food packaging, and analyzer calibration.

Why blend on site rather than buy pre-mixed

Pre-mixed cylinders are fixed at the moment they are filled. The blend cannot be adjusted, the cylinder has to be re-ordered and re-certified whenever a specification changes, and its composition can drift over a long shelf life. Blending on site gives you the mixture you need when you need it, at the concentration you choose, with the purity of the source gases preserved through ultra-high-purity gas handling.

The ASTG-RBS Remote Blending System

The ASTG-RBS pairs computer-controlled mass-flow blending with the convenience of remote I/O blend modules. It divides into two functional elements:

• The Control Head — the computer-controlled element that sets and holds the blend.
• The Dilution I/O® — remote blend modules placed where the gas is actually needed, rather than requiring the whole system to sit at the point of use.

Separating the two means one control point can serve blend modules distributed across a facility, which is what makes the system practical in a fab or a multi-tool laboratory.

Where ASTG gas blenders are used

• Semiconductor manufacturing — process gas mixtures at ultra-high purity, alongside UHP gas analysis and monitoring.
• Laboratory and research — controlled compositions for experimental work and method development.
• Food and beverage packaging — modified-atmosphere blends produced to a consistent specification.
• Analyzer calibration — generating known concentrations to verify instrument response, supporting the analytical systems industrial gas producers rely on.

Built to ultra-high-purity standards

A blender is only as clean as the gas path through it. ASTG builds blending systems using the same ultra-high-purity engineering techniques as the rest of its analytical line, including orbitally welded components, so the mixture that reaches the tool is the mixture that was specified and nothing else. Systems can be supplied alongside gas dividers and sequencers where a single source needs to feed multiple streams.

Gas blender FAQ

What is a gas blender?

A gas blender combines two or more source gases into a precise mixture at the point of use. It replaces pre-mixed cylinders, letting the user set the composition rather than accepting whatever was filled at the supplier.

How accurate is on-site gas blending compared with pre-mixed cylinders?

Computer-controlled mass-flow blending holds the set composition continuously and can be adjusted on demand, whereas a pre-mixed cylinder is fixed at fill and cannot be changed without re-ordering. On-site blending also avoids composition drift over a long cylinder shelf life.

What is the difference between the Control Head and the Dilution I/O?

The Control Head is the computer-controlled element that sets and maintains the blend. The Dilution I/O® modules are remote blend units placed where the gas is needed, so one control point can serve several locations across a facility.

Can a gas blender be used for ultra-high-purity semiconductor applications?

Yes. ASTG builds its blending systems with ultra-high-purity gas handling, including orbitally welded components, so source-gas purity is preserved through the blend path.

What gases can ASTG blend?

ASTG blending systems are configured to the source gases and target composition required for the application. Configuration is specified per installation, so the gases and concentration range are agreed as part of the system design.

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Related: Semiconductor UHP gas analysis · Industrial gas analytical systems · Gas subsystems · Analysis by bulk gas