Air Leak Tester is the automatic leak detector detects any leaks by the minute change of differential pressure and conducts OK/NG judgment. Ideal to be built into a production line for a laborsaving and a quality control purpose
Variety ranges from F.S.10mL/min to F.S 500L/min are available. Promotes an automation and a laborsaving of the measurement
Helium Leak Tester adopts the new testing method and Helium Leak Tester adopts the new testing method and
All Manometer comes with a traceability. Wide range of Manometers, from a micro pressure (F.S. 200Pa) to a high pressure (F.S. 50MPa) are available
Peripheral instruments are used with Air Leak Tester in order to enhance its functionality and convenience
We determine the acceptability of the sounds and vibrations of products using our special analyses developed in-house.
Materials combining unprecedented flexibility and durability
Why helium gas is used for leak test
| Vacuum Methods Vacuuming inside the tested part ● Vacuum spray method ● Vacuum hood method | Pressurization Methods Pressurizing inside of the tested part with helium gas ● Sniffer method ● Vacuum bell jar method ● Pressure accumulation method ● Bombing method |
Helium gas mixer and helium gas recycle machine are available to reduce the running cost.
Please ask your nearest Cosmo office, if you are interested. We will provide the best solution, depending on the initial cost and running cost.
| Test Method | Detection Accuracy | Entire Part Test | Locating Leaks | Automation | Initial Cost | Running Cost | Maintenance Cost | Applicable Product |
| Vacuum Spray Method | 1E-09Pa･m3/sec or higher | × | ○ | △ | ○ | △ | △ |  LDS3000 |
| Vacuum Hood Method | 1E-09Pa･m3/sec or higher | ○ | × | ○ | △ | △ | △ |
| Test Method | Detection Accuracy | Entire Part Test | Locating Leaks | Automation | Initial Cost | Running Cost | Maintenance Cost | Applicable Product |
| Vacuum bell jar Method | 1E-07Pa･m3/sec or higher | ○ | × | ○ | × | × | × | LDS3000 |
| Bombing Method | 1E-09Pa･m3/sec or higher | ○ | × | ○ | ○ | △ | × | |
| Sniffer Method | 1E-06Pa･m3/sec or higher | × | ○ | △ | ○ | × | △ |  P3000(XL) |
| Pressure Accumulation Method | 1E-05Pa･m3/sec or higher | ○ | × | ○ | △ | × | △ | LDS3000AQ |
Inside of the tested part is vacuum-evacuated and helium gas is sprayed from outside of the tested part by a spray gun.
Helium that leaks into the tested part is detected.
Inside of the tested part which is covered by a hood is vacuum-evacuated.
Inside of the hood is pressurized with helium, and helium leaks into the tested part is detected.
Inside of the tested part is vacuum-evacuated and pressurized with helium.
Helium that leaks to the outside of the tested part is detected by the sniffer probem.
Tested part is placed in a chamber. Inside of the tested part is vacuum-evacuated and then pressurized with helium.
Inside of the chamber is also vacuum-evacuated and helium that leaks into the chamber is detected.
Tested part is placed in a hood and inside of the tested part is vacuum-evacuated.
Then, the inside of it is pressurized with helium.
The helium that leaks into the hood is accumulated for a certain period to detect the helium (concentration)
Tested part is placed in a bombing tank which is vacuum-evacuated for a certain period.
Tested part is bombed with helium for a certain period and then removed from the tank and placed in the chamber which is vacuum-evacuated.
Helium that leaks into the chamber from the tested part is detected.
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180° Magnetic deflection mass spectrometer
Leak detector with valves to automatically select a port according to the pressure to be applied are available.
Feel free to contact Cosmo for more detailed information.
180° Magnetic deflection mass spectrometer
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