Vacuum technology covers much more than simply “removing air”. In practical engineering, vacuum refers to pressure below the surrounding atmospheric pressure, and the required vacuum level can vary enormously from one application to another.

A suction-cup handling system, a food-packaging machine, an electron microscope and a semiconductor process may all use vacuum, but they do not operate at the same pressure or use the same type of pump and sensor.

This FAQ section is therefore divided into three closely related areas: vacuum sensors, vacuum pumps and vacuum technology.

For measurement hardware, start with the Vacuum Sensors homepage. For the equipment that actually creates the vacuum, see the Vacuum Pumps section.

What does a vacuum system need?

Most practical vacuum systems contain three basic functions:

Vacuum generation: a pump, ejector or other device removes gas and lowers the pressure.

Vacuum measurement: a sensor or gauge tells the system what pressure has actually been reached.

Vacuum control: a PLC, controller, switch or process system uses that measurement to manage pumps, valves, alarms or machine sequences.

This is why how a vacuum pump works and how a vacuum sensor works should be considered together rather than as unrelated subjects.

Why are different vacuum sensors required?

Vacuum covers a wide pressure range. A compact sensor used on a robotic suction cup does not necessarily use the same measuring principle as a gauge used in a high-vacuum chamber.

Different applications may require different sensor technologies, pressure ranges, materials and calibration methods.

The best starting points are the different types of vacuum sensors and how to choose a vacuum sensor.

Why does vacuum pump selection matter?

Vacuum pumps differ in operating principle, achievable pressure range, pumping capacity, maintenance requirements and suitability for different processes.

A pump should therefore not be selected only by asking “how much vacuum does it produce?”

The application may also depend on system volume, pumping speed, process conditions, maintenance requirements and energy consumption.

See what to look for when choosing a vacuum pump and the different types of vacuum pumps.

Where is vacuum technology used?

Vacuum technology is used across scientific, industrial and manufacturing applications.

Examples include:

• Electron microscopy
• Semiconductor production
• Research laboratories
• Vacuum packaging
• Industrial handling and suction systems
• Various scientific and engineering processes

The wider application area is covered in what vacuum technology is and where it is used and industries that use vacuum technologies.

Why does vacuum-system efficiency matter?

The energy required by a vacuum system depends on factors such as the required vacuum level, pumping speed and overall system design.

Energy use can therefore be influenced by both pump selection and the way the system is controlled.

For the pump itself, see how much energy a vacuum pump consumes. For the wider system, see energy efficiency in vacuum technologies.

Why are maintenance and calibration important?

A vacuum system may gradually lose performance if pumps, seals, sensors or other components are not maintained correctly.

On the measurement side, vacuum sensor maintenance and calibration helps keep pressure readings reliable.

On the generation side, vacuum pump maintenance and repair is equally important for consistent system performance.

Why does vacuum safety matter?

Vacuum systems should not be treated as inherently harmless simply because the internal pressure is lower than atmospheric pressure.

Equipment, materials and operating procedures must be appropriate for the actual vacuum application.

Safety is covered separately in safety measures used in vacuum technologies.

How is vacuum technology changing?

Modern vacuum systems increasingly focus not only on achieving the required vacuum level, but also on efficiency, monitoring, control and more sustainable operation.

Current and future developments are covered in:

the latest innovations in vacuum technologies, the future of vacuum technology and vacuum technology and sustainability.

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Vacuum sensors — questions and guides

What is a vacuum sensor and how does it work? | Different types of vacuum sensors | Vacuum sensor applications | Advantages and disadvantages of vacuum sensors | Maintenance and calibration

Checking vacuum sensor efficiency | Materials used in vacuum sensors | Vacuum sensor vs pressure sensor | Vacuum sensor lifespan | Choosing a vacuum sensor

Vacuum pumps — questions and guides

What is a vacuum pump and how does it work? | Different types of vacuum pumps | Vacuum pump applications | Vacuum pump maintenance and repair | Advantages and disadvantages of vacuum pumps

Choosing a vacuum pump | Measuring vacuum purity | Vacuum pump oils | Vacuum pump vs pressure pump | Vacuum pump energy consumption

Vacuum technology — questions and guides

What is vacuum technology and where is it used? | Why is vacuum technology important? | Materials used in vacuum technology | Industries using vacuum technology | Latest vacuum technology innovations

Vacuum vs atmospheric-pressure technology | Vacuum technology safety | Future of vacuum technology | Vacuum technology sustainability | Vacuum technology energy efficiency

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Main vacuum sections:
Vacuum Sensors homepage | Vacuum Pumps homepage | Pressure Sensors homepage

A vacuum system should be evaluated as a complete system: pump, sensor, process volume, operating pressure, maintenance requirements and control method all affect real-world performance.

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