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The D550 Mechanical Precision Leak Tester is a bench-top air leak detection instrument designed for quality control of aerospace components. It uses the differential pressure method: a test part and a sealed reference volume are charged to the same pressure, and any pressure difference that develops during the test phase indicates a leak. This approach achieves a pressure-decay resolution of 0.1 Pa/s, suitable for verifying seals in hydraulic fittings, fuel line connectors, sensor housings, and valve bodies.
The mechanical model regulates pressure through two rotary knobs on the front panel. The left knob is labeled "Vacuum regulation" and controls negative pressure set points; the right knob is labeled "Pressure regulate" and controls positive pressure set points. Operators turn the knobs to the desired pressure while monitoring the readout on the touchscreen. The instrument supports five selectable pressure ranges, from -98 to +100 kPa up to -98 to +1000 kPa, with three differential measurement ranges: ±1000 Pa, ±2000 Pa, and ±5000 Pa.
The instrument is equipped with a 5.6-inch color LCD industrial resistive touchscreen at 640×480 resolution, with Chinese and English language options. Up to 64 parameter channels can be stored, each retaining fill time, stabilization time, test time, pressure limits, and leak-rate thresholds for different component SKUs. This allows production teams to maintain separate recipes for aluminum housings, titanium fittings, and composite seal assemblies.
Sixteen opto-isolated input channels and sixteen relay output channels support integration with PLC systems, pneumatic fixture cylinders, and conveyor line controls. Test initiation is available through on-screen touch, wired external signal input, or barcode scanner trigger. The D550 mechanical model does not include wireless remote control; external triggering is handled exclusively through the wired I/O interface.
Internal storage holds the latest 50,000 test records, searchable by date or channel name, with export via USB, Ethernet, or RS485 in Excel-compatible format. The unit can drive label printers directly and supports specific barcode scanner models for QR code and linear barcode reading. A pressure-hold (bubble test) mode maintains output pressure during soap-water visual inspection for leak location, and a product counter tracks the number of units tested per shift. Power is supplied at DC 24 V 1.5 A through an included 220 V-to-24 V adapter, with audible buzzer and on-screen visual alarms for pass and fail outcomes.
The mechanical model uses two manual rotary knobs for pressure adjustment. The left knob, marked "Vacuum regulation," sets the negative pressure (vacuum) level, and the right knob, marked "Pressure regulate," sets the positive pressure level. Each knob features a red arc indicator and plus/minus markings to guide adjustment direction. Operators set pressure by rotating the knob while observing the live pressure reading on the touchscreen. Both positive-pressure and vacuum test profiles are available within the selected range. The differential pressure sensor is rated for 4 MPa overpressure. Pressure repeatability is ±0.5% F.S., and comprehensive pressure sensitivity is ±0.25% F.S. Pressure resolution is 0.001 kPa, displayed to three decimal places, with selectable units including kPa, bar, Pa, PSI, mmHg, mmH₂O, MPa, mbar, kgf/cm², and atm.
Aerospace components operate under stringent sealing requirements, where even minor leaks in hydraulic lines, fuel connectors, or sensor housings can lead to system failure. The D550 mechanical leak tester is used on production and inspection lines for aluminum and titanium fittings, quick-disconnect couplings, valve bodies, actuator housings, and environmental control system ducts. The mechanical knob interface allows technicians to adjust pressure set points directly on the shop floor without navigating digital menus, which is practical in work cells where test parameters change frequently between component batches. The 64-channel recipe memory supports mixed production lines handling multiple part numbers, and Excel-format data export provides the traceable records required by aerospace quality management systems. The instrument uses clean compressed air or nitrogen meeting ISO 8573-1 or JIS B8392-1 grade, ensuring no residual contamination is introduced to precision components during the test cycle.
The mechanical model has two rotary knobs on the front panel. The left knob adjusts vacuum (negative pressure) and the right knob adjusts positive pressure. Operators rotate the knob while watching the live pressure readout on the touchscreen until the target value is reached.
No. The D550 does not include wireless remote control. Test start and channel switching can be triggered through wired external I/O signals, PLC connection, or barcode scanner input.
The mechanical model offers five pressure ranges: -98 to +100 kPa, -98 to +200 kPa, -98 to +500 kPa, -98 to +700 kPa, and -98 to +1000 kPa. Differential measurement ranges are ±1000 Pa, ±2000 Pa, and ±5000 Pa.
Yes. The instrument stores up to 50,000 test records internally, queryable by date or channel. Data can be exported via USB, Ethernet, or RS485 in Excel-compatible format for quality documentation and batch traceability.
