Air-Tight Leak Detector
Air-Tight Leak Detector
For components and assemblies with a sealable test volume, to use differential-pressure measurement to observe leakage and build a leak-test process with suitable fixtures. Circuits and fixtures are selected for the sample and required tests.
Product Overview
Application and test scope
Air-Tight Leak Detector is intended for components and assemblies with a sealable test volume. It is used to use differential-pressure measurement to observe leakage and build a leak-test process with suitable fixtures. The test arrangement is selected around the sample construction, service conditions and required evaluation method.
Tests and configuration
- Parameter settings for fill, stabilisation, measurement and exhaust stages
- Pressure and differential-pressure leakage criteria
- Sample recipes, test curves and result records
Typical test workflow
Connect the sample to a sealed fixture, determine fill and stabilisation conditions for its volume and material, then measure differential pressure. Match acceptance limits to the allowed leakage and selected measurement units.
Selection information
For a suitable proposal, provide test pressure, internal volume, allowable leakage, measurement units, fixture sealing, cycle time and external interface requirements. Product drawings or a sample help define connections, locating tooling and test circuits.
Measurement ranges, accuracy, automation, data interfaces and acceptance criteria are defined by the selected configuration and agreed technical proposal.
Existing equipment information
Product Overview
The AL-700 series differential pressure air leak tester uses a high-sensitivity differential pressure sensor for excellent measurement accuracy. Its large-bore pneumatic valve provides fast charging, reliable sealing, no heat generation and a long service life. The instrument offers intelligent testing: a learning correction function compensates for errors caused by temperature and deformation, allowing accurate measurement in a short time and greatly improving test throughput.
Key Features
- 4.3″ LCD screen with a clear, easy-to-read interface
- High-sensitivity, small-volume differential pressure sensor
- Dedicated high-flow, non-heating pneumatic valve
- Simple air circuit with a small internal volume
- Intelligent testing — accurate and efficient
- Selectable leak units: Pa, ml/min, Pa/s
- 99 channels, each with independently configurable parameters
- Storage for 9,999 data sets, exportable via USB
Application Areas
Automotive components: cylinder block, cylinder head, oil pan, engine, radiator, petrol pump, washer pump, electronic fuel pump, vane pump, gear pump, brake booster, intake manifold, exhaust manifold, oxygen sensor, vehicle lamps.
Gas appliances: cooker assemblies and fittings, corrugated hoses, pressure regulators, plug valves.
Electrical products: sealed relays, sealed motors, submersible pumps, hard disk drives, etc.
Hydraulic and pneumatic components: solenoid valves, cylinders, filters, various water valves.
Others: medical device components, watches, underwater cameras, food packaging.
Model Selection
| Model | Test pressure |
| AL-700 | −5 kPa to −90 kPa |
| AL-710 | 5 – 100 kPa |
| AL-720 | 0.02 – 0.2 MPa |
| AL-730 | 0.02 – 0.4 MPa |
| AL-740 | 0.02 – 0.7 MPa |
| AL-750 | 0.1 – 1.2 MPa |
| AL-760 | 0.1 – 1.8 MPa |
| AL-770 | 0.1 – 2.5 MPa |
Performance and Specifications
| Measuring method | Differential pressure detection | |
| Differential pressure | Accuracy | ±(1% Rdg + 1 Pa) |
| Test range | (−999 to +999) Pa | |
| Resolution | 1 Pa or 0.001 ml/min | |
| Sensor range | ±2500 Pa | |
| Sensor pressure resistance | 2 MPa | |
| Test time | Setting range | 0 – 999.9 s (delay, pressurisation, stabilisation, detection, exhaust) |
| Resolution | 0.1 s | |
| Pilot pressure | 400 – 600 kPa clean, dry, non-corrosive gas | |
| Display | 4.3″ LCD screen | |
| Curve display | Time–leakage curve | |
| Input terminals | 7 channels | |
| Output terminals | 8 channels, RS232, DC 24 V, 4 – 20 mA (optional) | |
| Bubble function | Continuous air supply for leak location | |
| Group settings | 99 groups with independent parameters | |
| Judgement limits | Pressure judgement, test result judgement | |
| Zero / learning function | Eliminates measurement errors caused by temperature and deformation of the test part | |
General Specifications
| Weight | Approx. 11 kg |
| Operating temperature | 0 – 50 °C |
| Relative humidity | ≤85% RH (non-condensing) |
| Air supply | Stable, clean, dry, non-corrosive gas with a dew point ≤ −25 °C |
| Power supply | AC 100 – 240 V ±10%, 50 Hz |
| Dimensions | 250 mm × 195 mm × 420 mm (W × H × D) |
Interested in this equipment?
Tell us your testing needs — we will tailor a solution for you
Email Inquiry