How to Choose a Leak Test Instrument
Made in the USA
Choose the method from the reject leak rate, the part's internal volume and the cycle time; then choose the instrument from channels, mounting space and interface. Pressure and vacuum decay suit most small to moderate volumes; mass flow suits larger volumes and faster cycles.
Test methods
| Method | How it works | Typical fit |
|---|---|---|
| Pressure decay | Pressurize, isolate, measure the drop | Most sealed parts |
| Vacuum decay | Evacuate, isolate, measure the rise | Parts that see vacuum in service |
| Mass flow | Measure flow to hold test pressure | Larger volumes, fast cycles |
| Differential pressure | Compare against a reference volume | Very small leak rates |
Which instrument?
| If you need… | Consider |
|---|---|
| A compact, cost-effective decay tester | Defender |
| The smallest footprint in a machine | Stealth (4.5 in wide) |
| The fastest cycle, or mass flow | UltraFlow V3 / V3 RT |
| Several channels from one instrument | Guardian or 700 Series |
What to send EAC
- Reject leak rateAnd the test pressure.
- Part volumeInternal test volume.
- Cycle timeTime available at the station.
- ChannelsHow many parts or ports test at once.
- MountingSpace available and distance to the part.
- InterfaceYour PLC and the I/O or network required.