Sentinel 3520
Category: Leak Test Instruement
A Reliable, Repeatable System for Leak Testing Large Parts
18 September 2025
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Sentinel 3520 — A Reliable, Repeatable System for Leak Testing Large Parts
When you’re struggling to balance accuracy, cycle time and Gage R&R for a complex leak test, the Sentinel 3520 is up to the challenge. It is a pressure decay and mass flow instrument particularly suited to large parts such as EV batteries, variable volume parts, and parts requiring temperature and other compensation— all while delivering speed, accuracy, and repeatability. This instrument offers advanced configurability using CTS partner company Sciemetric’s digital signature analysis software.
Performing in the Most Challenging Leak test Situations
Many manufacturers struggle with leak test station accuracy, cycle time, and Gage R&R, particularly when faced with complex leak test requirements like large volume leak test, variable volumes, multi-cavity parts, low leak rates, and pressure stability. It is a top choice for EV battery testing.
These test scenarios require a precise balance of pressure control, flow range and fill rate to get an accurate reading and meet cycle time requirements, which the Sentinel 3520 delivers.
- Testing large parts, up to 1000L
- Testing variable volume parts with multiple cavities
- Achieving balanced accuracy, cycle time, and Gage R&R
- Uniquely compensating for temperature, atmospheric and barometric fluctuations affecting test
Leak and Flow Test Instrument: Test Types
Depending on your test needs, the Sentinel 3520 can be configured to meet your requirements for pressure range, flow meter range and flow configuration. The Sentinel 3520 supports the following test types:
- Pressure/Vacuum Decay: Leak Standard
- Pressure/Vacuum Decay: ΔP
- Pressure/Vacuum Decay: ΔP/ΔT
- Occlusion: Pressure or Vacuum
- Ramp to Proof: Pressure (Burst Test)
- Pressure Verify
- Customizable Pressure / Flow Sequencing
- Mass Flow (Flow Models)
- Test Volume Verification (Flow Models)
Product Highlights
- Pressure measurement and control resolution down to ±0.000,01 psi
- Flow measurement down to ±0.2 % of full scale
- High flow fast fill up to 300 SLPM
- Test parts from 1 cc to 1,000,000 cc in volume
- Helium evacuate and fill
- Customizable pressure and flow sequencing
- sigPOD controller equipped with PSV software, using digital process signatures for advanced test analysis
- Use the sigPOD controller to conduct an additional in-process test such as press-fit, weld or dispense monitoring
