What Information Is Needed Before Selecting a Helium Leak Testing System?
Before selecting a helium leak testing system, manufacturers should define the component, required leak limit, test pressure, production rate, cycle time, automation level, plant layout, and production interfaces. These inputs help determine the suitable test method, detector, vacuum system, fixture or chamber, controls, and integration requirements.
At Access Technology, our team helps manufacturers review these requirements before recommending a helium leak testing arrangement according to the application and agreed project scope.
Quick Checklist: What Information Should You Prepare?
The most useful starting information is the component specification, required leak limit, test pressure, production target, automation requirement, available space, and existing production interfaces.
| Information | Why It Matters |
|---|---|
| Component description | Defines what needs to be tested |
| Dimensions and internal volume | Affects fixture, chamber, evacuation, and cycle time |
| Required leak limit | Influences method and detector requirements |
| Operating and test pressure | Determines how the component can be prepared |
| Production rate | Affects test cycle and automation |
| Available test time | Helps define equipment and sequence |
| Possible leak locations | Influences vacuum vs sniffer method selection |
| Automation level | Determines controls and machine interfaces |
| Plant space | Affects chamber, fixture, and equipment layout |
| Existing vacuum equipment | Helps determine whether additional vacuum equipment is required |
| Upstream and downstream machinery | Affects production-line integration |
1. What Component Information Is Needed?
We review the component itself before selecting the test method because size, internal volume, geometry, sealing points, and accessibility can change the required fixture, chamber, vacuum arrangement, and test sequence.
Useful component information includes:
Internal volume can influence evacuation time and the required pumping arrangement, while component geometry affects whether the part can be sealed with a fixture, placed in a chamber, or inspected using a sniffer probe.
For manufacturers who first need to understand the overall process, our guide on how helium leak testing works explains the basic test sequence and system components.
2. What Leak Limit or Acceptance Criteria Is Required?
The required leak limit should be defined before final equipment selection where possible because it can influence the detector, test method, vacuum conditions, fixture design, test time, and pass/fail logic.
We normally ask whether a leak acceptance value has already been defined by product engineering, customer specifications, internal quality requirements, process requirements, or applicable technical standards.
If the required leak limit is still unknown, this should be identified early rather than replaced with a generic assumption. The final value should be considered together with the component condition and test method before the equipment arrangement is confirmed.
3. What Operating and Test Pressure Should Be Defined?
Operating and test pressure help determine whether the component can be evacuated, pressurised, or tested using a specific helium leak testing method.
We typically review:
For manufacturers still evaluating the most suitable approach, our guide on vacuum vs sniffer helium leak testing explains how pressure condition, leak-location requirements, component access, and production needs affect method selection.
4. How Much Production Throughput Is Required?
We review production throughput together with the leak requirement because a technically suitable test method still needs to fit the available manufacturing cycle.
Useful production information includes:
Evacuation, pressurisation, inspection, loading, and unloading all contribute to total cycle time. We therefore evaluate the leak requirement and manufacturing cycle together rather than selecting the test method independently.
5. Is the Test Manual, Semi-Automatic, or Fully Automated?
The required automation level affects fixture design, chamber operation, PLC controls, sensors, pass/fail handling, alarms, machine interlocks, and production communication.
A helium leak testing station may be:
For an automated system, the controls may need to coordinate component detection, clamping, valves, vacuum pumps, helium introduction, detector signals, alarms, pass/fail handling, and communication with surrounding equipment.
The exact requirements depend on the agreed project scope and existing control architecture. Where wider integration is needed, our guide to the information needed before an automation integration project outlines the production, equipment, controls, and layout information we typically review.
6. What Plant Layout and Installation Information Is Needed?
Plant layout information helps us determine whether the proposed test arrangement can fit the available space while allowing practical operation and maintenance access.
We may review:
Available space can influence whether a chamber-based system, fixture-based station, or more compact test arrangement may be more practical for the application.
The equipment layout should also consider how operators load components, how maintenance personnel access pumps and valves, and how the testing station connects to the surrounding production process.
7. What Existing Vacuum Equipment Should Be Reviewed?
We do not automatically assume that new vacuum equipment is required. Existing pumps and piping should first be reviewed against the target vacuum condition, test volume, evacuation time, and operating requirements.
We may assess:
A vacuum pump may appear suitable based on rated capacity but still be limited by long piping, small pipe diameter, restrictive valves, or other system conditions.
Our guide on how vacuum piping affects pump performance explains why the pump and piping should be evaluated as one system.
8. What Control and Machine Interfaces Are Required?
Control and machine-interface requirements determine how the helium leak testing station communicates with operators and surrounding production equipment.
Depending on the project, we may need to review:
For example, an automatic production line may need to prevent downstream transfer if a component fails the leak test.
The exact interface depends on the agreed project scope and existing control architecture, so confirming these requirements early helps reduce avoidable changes later.
What Happens If Some Information Is Not Available Yet?
Not every manufacturer will have all technical information available at the first enquiry. Where some details are still unknown, we can identify which items should be confirmed before final equipment selection.
Common examples include:
Missing information does not necessarily prevent an initial discussion, but it may limit how precisely the final test system can be specified. Our approach is to separate confirmed requirements from assumptions and identify which outstanding items need to be resolved before the equipment scope is finalised.
How We Review the Information Before Recommending a System
At Access Technology, our team reviews the complete application rather than selecting the detector first and trying to fit the rest of the system around it.
Our decision sequence is:
We first define what needs to be tested and what acceptance criteria the test must assess. We then review how the component can be prepared, how quickly the test must operate, and what vacuum, mechanical, and control interfaces are required.
This allows us to evaluate the detector, vacuum equipment, fixtures, valves, piping, controls, and production interfaces as one coordinated test arrangement.
Where equipment and integration support are required, we can also help evaluate suitable helium leak testing equipment according to the application and agreed project scope.
Prepare the Right Information Before You Select a System
The more clearly the component, leak requirement, test pressure, cycle time, automation needs, and production interfaces are defined, the easier it is to evaluate a suitable test arrangement. At Access Technology, our team can help review these inputs and recommend the next equipment and integration steps according to the agreed project scope.
Discuss Your Helium Leak Testing RequirementsFrequently Asked Questions
Conclusion
Selecting a helium leak testing system requires more than choosing a detector. The component, leak limit, test pressure, cycle time, vacuum conditions, fixtures, automation, plant layout, and machine interfaces should all be reviewed before the final arrangement is defined.
At Access Technology, we help manufacturers organise and evaluate these requirements so the helium leak testing system can be selected around the actual production process and agreed project scope.