Vacuum Leak Test Systems


Leaks, even when they are small, can have a significant impact on the performance of a part or component or cause equipment to fail. Cracks and faulty seals are often the cause of these leaks, but they can often be detected by conducting vacuum testing on components prior to manufacturing.
Vacuum leak testing is the principal leak test method for testing sealed parts that could have leakage from an external source into their housings and casings. Prime candidates for vacuum leak test procedures include:

  • Underwater sensors or housings
  • Outdoor electrical housings
  • Sealed components
  • Components associated with vacuum sources

Is There A Difference Between Vacuum Leak Testing and Pressure Decay Testing?

During a vacuum leak test procedure, the part or vessel being tested (the test piece) is connected to a pressure/vacuum line and placed in the test chamber. The chamber is closed and sealed, all supply valves are closed, and the test piece and the chamber are simultaneously evacuated via vacuum to a preset pressure level. Once the pressure has stabilized, any pressure change in the test piece is compared to pressure changes in the chamber’s reference volume. If the test piece does, in fact, leak, the pressure difference between the two will increase. This data is measured and recorded.
Vacuum leak detection functions in a similar, but essentially opposite, manner as pressure decay testing. For instance, during pressure decay testing the test chamber is pressurized and the test chamber is monitored for a decrease in pressure indicating a leak from the chamber into the part.  However, in vacuum decay the part being tested is pressurized and the test chamber is monitored for an increase in pressure indicating a leak from the part into the chamber.
Compared to pressure decay testing, vacuum leak testing can provide better repeatability because it is less sensitive to environmental variables created by temperature changes. A vacuum leak detector often requires less time to reach a stable test pressure, is less susceptible to potential instability of tested parts, and offers shorter cycle times than tests in many pressure decay applications.

Our Vacuum Leak Test Solutions Provide Accurate Testing and Reliable Results

Cincinnati Test Systems (CTS) designs and manufactures a full line of vacuum leak test instruments that utilize innovative technology to deliver reliable, repeatable solutions to leak testing challenges. We differentiate ourselves from the competition by offering a broad range of vacuum leak test technologies that can be seamlessly integrated into custom turnkey systems.
Our experience in systems integration makes us a better vacuum leak test instrument manufacturer; our experience with instrument manufacturing makes us a better systems integrator. Our engineering team’s comprehensive understanding of industry best practices gives us a unique advantage in the design and manufacture of robust, reliable solutions for vacuum leak test procedures. We have a long history of delivering innovative, cost-effective vacuum leak systems for difficult applications.
Contact CTS to learn more or to request a quote on the vacuum test instrument you need.

Turnkey Vacuum Leak Detectors Configured to Your Specifications

Effective vacuum leak test procedures require more than just a vacuum test unit. We offer a full line of state-of-the-art vacuum leak test instruments that feature proven mechanical designs and superior engineering for fast test cycles and consistent, reliable results. If you need a complete vacuum leak test system, look no further than CTS.
  • Sentinel Blackbelt: a multi-test configurable vacuum testing solution with a benchtop configuration. Features auto setup and calibration and standard test pressure ranges of -14.5, -2, 0.5, 2, 10, 30, 100, 200, 400, 500 or electronic regulation (PSIG).
  • Sentinel C20WE (World Edition): single test configurable vacuum leak detector with a wall mount design. Features auto calibration and provides standard test pressure ranges of -14.5, 15 or 100 (PSIG).
  • Sentinel C28WE Leak Test Instrument: single test configurable vacuum testing in a wall-mount configuration. Features auto calibration and adjustable environmental drift correction. Standard test pressure ranges are -14.5, 2, 30, 100, 200, or electronic regulator (PSIG).
  • Sentinel I28: multi-functional, single-station vacuum leak detector with a small footprint for benchtop use or wall mounting. Features easy operator setup and auto calibration. Standard test pressure ranges are -14.5, -2, -0.1 to 4” HG, 0.5, 2, 30, 100, 200, 400, 500, or electronic regulation (PSIG).

Contact Cincinnati Test Systems for Vacuum Leak Testing Systems

Interested in a custom vacuum leak test system? Contact CTS today to learn more or to put our team to work on the vacuum testing unit you need.