LACO’s Reservoir Helium Permeation Leak Standards are robust and reliable options for leak standards in the 10-9 atmcc/sec leak rate range and lower. Our fused silica permeation element with an all metal seal provides for consistent and stable leak rates for years to come. These leak standards are available in a wide range of configurations, including many outlet port configurations.
Typical applications requiring a helium leak standard include
- Mass Spectrometer Leak Detectors
- Helium Comparison or Transfer Leak Standards
available Tolerance options
LEAK STANDARD TYPE | STANDARD TOLERANCE | PRECISION TOLERANCE | HIGH PRECISION TOLERANCE |
|---|---|---|---|
| Polymicro Helium Reservoir | ± 1.0 of Mantissa | ± 10% of Nominal | ± 2% of Nominal |
| Permeation Helium Reservoir | ± 1.0 of Mantissa | ± 10% of Nominal | Not available |
| Open-Style: Helium | ± 1.0 of Mantissa | ± 10% of Nominal | ± 2% of Nominal |
| Open-Style: Air | ± 20% of Nominal | ± 5% of Nominal | Not available |
| Sniffer: Helium | ± 1.0 of Mantissa | ± 10% of Nominal | Not available |
| Alternate Gas | ± 1.0 of Mantissa | ± 10% of Nominal | Not available |