Testing Channels
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Leak Tester
Z5 4-Channel Air Leak Tester
Reliable Air Leak Testing Solutions
The Zaxis Z5 is a compact, multi-channel air leak tester built for factory automation. With up to 4 independent test channels in a 6.5” × 7” × 9” footprint, it runs pressure decay, vacuum decay, occlusion, mass flow, burst and other leak tests sequentially or concurrently, right at the production line.
A 5” touchscreen with pinch zoom and light and dark modes makes leak test setup fast, with no lengthy operator training. Store up to 100 unique test programs, switch between them through a single test port, and log results with optional onboard statistics.
High sensitivity comes from low internal volume, a 32-bit ADC and fast scan rates, delivering 0.00001 PSI result resolution across pressure ranges from 2 to 1,000 PSIG and 0–14.7 PSI vacuum. Built-in manual or electronic regulators and an optional calibrated leak standard prove every test setup.
Integrate with PLCs and automation cells over OPC UA, Ethernet/IP, TCP/IP, USB and 24 VDC I/O, with up to 4 optional pneumatic valves for fixtures and tooling. Made in the USA by Zaxis, a leak test equipment manufacturer for over 25 years with CE, ISO 9001, REACH and RoHS compliant products, the Z5 serves medical device, automotive and electronics manufacturers worldwide.
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How is Leak Rate Calculated →Why Choose the Z5 Leak Tester for Your Production Line?
Designed for both efficiency and precision, the Z5 Leak Tester streamlines your air leak testing process. Whether you’re running multiple programs or performing complex tests, this tester delivers reliable results while saving space and operator time.
Every Z5 ships with the same core: a 32-bit analog-to-digital converter, low internal volume and fast scan rates, which together let the tester resolve pressure changes down to 0.00001 PSI. That resolution is what allows short test times on small parts and dependable pass/fail decisions on larger ones, without adding cycle time to your line.
Testing Channels
Footprint
Perfect for tight factory spaces without sacrificing performance.
Interface
Easy setup, programming, and real-time monitoring.
Design
Store and switch between multiple programs with ease.
Precision
High accuracy at low measurement levels for consistent quality control.
Benefits of the Z5 Leak Tester
The Z5 was designed for production leak testing where floor space, changeover time and operator training all cost money. Up to four independent test channels share one 5” touchscreen, so a single compact unit can test four parts at once or step through four different tests on one assembly. Programs, limits and results live on the tester, and the modular platform means a Z5 bought for one product can be re-configured for the next.
- ✓Single screen test set up with HDMI output.
- ✓Modular design for custom configurations and future upgrades.
- ✓Can run up to 4 test ports, sequentially or concurrently.
- ✓High sensitivity thanks to low internal volume, 32-bit ADC, and fast scan rates.
- ✓Intuitive touchscreen interface makes test setup quick and easy, no need for a lengthy training session.
- ✓Up to 4 optional pneumatic valves for controlling tooling motions and fixtures.
- ✓Multiple communication options (Ethernet IP, TCP/IP, USB).
- ✓Electronic or manual high-pressure regulators from 2 to 1,000 psi.
- ✓Up to 100 unique stored programs and optional onboard storage test results.
How a Z5 Leak Test Runs
A pressure decay test on the Z5 is a four-stage cycle, and every stage is a programmable time and pressure value stored with the part’s program.
Fill
The part is connected through a fitting or fixture and pressurised to the test pressure set by the built-in manual or electronic regulator.
Settle
The air source is valved off and the part is given time to stabilise, so stretch, flex and temperature effects are not read as leaks.
Test
The transducer watches pressure over the test time. Any drop is a leak; if the decay stays inside the reject limit the part passes and the green light and PASS output fire.
Vent
Remaining pressure is released to atmosphere, the result is logged, and the next part — or the next channel — can start.
Decay is converted to a leak rate in SCCM from the pressure drop, the test volume and the test time; use the calculator at the top of this page to size a test, and read the full method on our leak rate calculator page.
Available Zaxis Z5
Leak Test Types
Leak test method is dictated by the part, not the tester. Pressure decay suits sealed components with a single access port; vacuum decay is the inverse, for parts that see negative pressure in service or cannot be pressurised; occlusion and back-pressure flow confirm that a passage is open (or blocked) rather than sealed; mass flow measures flow through parts with two open ports; burst and pressure-cracking are destructive tests that find the pressure at which a part fails or a valve opens; and chamber testing wraps a sealed device with no port — electronics, packaging, IP67 enclosures — in a fixture and measures around it. The Z5 can be configured for any of these, and each of its stored programs can use a different method.
Where the Z5 Is Used
The Z5’s combination of high sensitivity and up to four channels makes it a common choice wherever small or medium parts are leak tested at production rates.
Catheters and medical tubing
Pressure decay and occlusion testing of balloon and multi-lumen catheters, extension sets and ventilator tubing, including test methods correlated to ISO 10555.
Read more →Medical fluid bags and drug-delivery devices
Low-pressure decay tests on IV bags, reservoirs and dispensing components where a leak is a patient-safety failure.
Read more →Automotive components
Sensors, connectors, fluid lines, housings and intake components tested against IP and OEM leak specifications.
Read more →EV and battery manufacturing
Sealed battery enclosures, cooling circuits and electronics housings where ingress protection is a warranty item.
Read more →Sealed electronics and IP-rated enclosures
Chamber and pressure decay tests that verify IP65/IP67 ratings on housings, wearables and rescue beacons.
Read more →Multi-cavity assemblies
Up to four channels test several cavities of one assembly — or four parts in one fixture — concurrently or in sequence.
Read more →Technical Specifications
Specifications below are for the standard Z5 platform. Pressure range, regulator type, test-port fittings, valve options and communications are selected per order, so a Z5 built for a 2 PSIG medical bag test and one built for a 1,000 PSIG hydraulic component share the same footprint and interface. For complete configuration options, download the full specification sheet.
- Dimensions
- 6.5” wide, 7” high, 9” deep
- Measurement Resolution
- 0.00001 PSI test result resolution
- Test Port Fitting
- 1/4″ or 1/8″ FNPT female bulkhead
- Pressure Range
- 2, 10, 15, 30, 60, 100, 150, 300, 400, 500, 725, 1000 PSIG positive pressure; 0–14.7 PSI vacuum (other ranges available upon request)
- Display
- 5” touch screen, pinch zoom, light & dark mode
- Performance
- 32-bit ADC
- Regulator
- Built-in manual or electronic
- Leak Standard
- Optional calibrated leak tool to prove your test setup
- Stored Programs
- 100 — allows multiple parameters through a single port
- Memory
- Optional onboard storage of test results with statistics
- Connectivity/Power
- USB, Ethernet/IP, TCP/IP, 24VDC I/O
Compare Leak
Testing Performance
All Zaxis air leak testers share the same test methods, resolution and touchscreen interface; they differ in channel count, footprint and options. Choose the Z5 when you need up to four channels in a benchtop or in-cell footprint. The Z8 adds pneumatic capacity and ports for larger automation cells, the Z1 is a single-channel unit for one part at a time, the Z5L is the entry-level single-channel version of the Z5, and the VM3 volumetric tester runs pressure decay without an external air supply.
| Test Types |  Zaxis Z8 | Zaxis Z5 |  Zaxis Z1 |  Zaxis Z5L |  Zaxis Z8N |  VM3 Volumetric |
|---|---|---|---|---|---|---|
| Pressure Decay | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Vacuum Decay | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
| Occlusion | ✓ | ✓ | ✓ | ✓ | ✓ | × |
| Thermal mass flow | ✓ | ✓ | ✓ | × | ✓ | × |
| Laminar mass flow | ✓ | × | × | × | × | × |
| Burst | ✓ | ✓ | ✓ | × | ✓ | × |
| Pressure Cracking | ✓ | ✓ | × | × | ✓ | × |
| Chamber | ✓ | ✓ | ✓ | × | ✓ | × |
| Back Pressure Flow | ✓ | ✓ | × | × | ✓ | × |
| High pressure (>200 psi) | ✓ | ✓ | ✓ | × | ✓ | × |
| Volumetric Decay | × | × | × | × | × | ✓ |
Industries We Serve
Zaxis leak testers are on production lines in medical device, automotive, electronics, consumer goods and industrial plants. The Z5 is most often specified where several small parts, or several cavities of one part, must be tested to a tight leak limit at line rate.
Z5 Leak Tester FAQ
What leak rate can the Z5 detect?
The Z5 resolves pressure changes to 0.00001 PSI. The smallest leak rate you can reliably reject depends on the part’s internal volume, the test pressure and the test time, because leak rate in SCCM is calculated from pressure drop, volume and time. Small-volume parts reach very low leak rates in seconds; larger volumes need longer test times. Our engineers will size the test for your part, or you can estimate it with the leak rate calculator on this page.
Does the Z5 need a compressed air supply?
Yes. The Z5 is fed from plant compressed air or a regulated gas supply through its rear supply port, and the built-in manual or electronic regulator sets the test pressure. If house air is not available at the test station, ask about the Zaxis VM3 volumetric tester, which runs pressure decay tests without an external air supply.
Can it test four parts at once?
Yes. The Z5 supports up to four test ports, which can run concurrently on four parts or four cavities, or sequentially through different tests on a single assembly. Each channel has its own program parameters and pass/fail result.
Which leak test methods does the Z5 support?
Pressure decay, vacuum decay, occlusion, back-pressure flow, mass flow, burst, pressure cracking and chamber testing. Different stored programs can use different methods, so one tester can cover several parts.
How many test programs can it store?
Up to 100 unique programs, each with its own pressures, times and limits. Programs are selected on the touchscreen or remotely over Ethernet/IP, TCP/IP or digital I/O, and results can be stored on board with statistics as an option.
How does the Z5 integrate with a PLC or automation cell?
Through OPC UA, Ethernet/IP and TCP/IP for program selection, results and data collection, 24 VDC digital I/O for start, pass, fail and busy signals, USB for data export, and up to four optional pneumatic valves for driving fixture clamps and tooling motions. An HDMI output mirrors the screen to a larger monitor.
How is the Z5 calibrated and verified?
Test pressure is checked against the transducer, and an optional calibrated leak standard lets you prove the test setup on the line: connect the standard, run the program and confirm the tester reads the known leak. Zaxis leak standards are calibrated and traceable.
What is the difference between the Z5 and the Z5L?
The Z5L is the entry-level, single-channel version of the Z5, offered in fixed 0–30 PSI or 0–100 PSI pressure decay or 0 to −14 PSI vacuum decay configurations, with TCP/IP and USB. The Z5 adds up to four channels, pressure ranges from 2 to 1,000 PSIG, electronic regulation, Ethernet/IP, pneumatic valve options and more configuration flexibility.
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Other Zaxis Products
The Z5 Leak Tester delivers high-precision air leak testing in a compact, user-friendly design. With a 5” touchscreen interface and up to 4 testing channels, it provides fast, reliable results for a variety of industrial applications. Its modular setup allows easy program storage and quick test changes, helping streamline your production process while maintaining quality.
