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The D550 Electronic Differential Leak Tester is a bench-top air leak detection instrument built for production-line quality control in medical device manufacturing. It operates on the differential pressure method: the instrument charges both a test part and a sealed reference volume to the same pressure, then measures the pressure difference that develops as air escapes from a leaking part. This method delivers a pressure-decay resolution of 0.1 Pa/s, allowing detection of small leaks in catheter hubs, syringe barrels, implant housings, and sterile packaging.
Pressure on the electronic model is regulated through internal digital proportional valves controlled via the touchscreen. The front panel contains no manual adjustment knobs; operators enter target pressure values numerically and save them to parameter recipes. The instrument supports both positive-pressure and vacuum test cycles across six selectable ranges, from -88 to +50 kPa up to -88 to +1000 kPa. Four differential measurement ranges are available: ±500 Pa, ±1000 Pa, ±2000 Pa, and ±5000 Pa.
The unit features a 5.6-inch color LCD industrial resistive touchscreen with 640×480 resolution, supporting Chinese and English operator interfaces. Up to 64 parameter channels can be stored, each holding an independent test recipe including fill time, stabilization time, test time, pressure limits, and leak-rate thresholds. This allows rapid changeover between product families on mixed production lines.
The instrument provides 16 opto-isolated input channels and 16 relay output channels for integration with PLC systems, fixture cylinders, and conveyor controls. Test initiation is available through three methods: on-screen touch, wired external signal input, or barcode scanner trigger. The D550 does not include wireless remote control; all external triggering is handled through the wired I/O interface.
Data management includes internal storage for the latest 50,000 test records, queryable by date or channel name. Records can be exported via USB, Ethernet, or RS485 in Excel-compatible format for batch traceability and quality audits. The unit also supports direct connection to label printers and specific barcode scanner models for QR code and linear barcode reading. A pressure-hold (bubble test) mode maintains output pressure while an operator applies soap solution for visual leak location, and a built-in product counter tracks production throughput. The system operates on DC 24 V at 1.5 A through an included 220 V-to-24 V adapter, with audible buzzer and on-screen visual alarms for pass and fail results.
The electronic model adjusts test pressure through internal digital valves commanded from the touchscreen interface. No rotary knobs are present on the front panel. Operators select a target pressure in 0.001 kPa increments, and the valve assembly holds the set point for the duration of the test cycle. Both positive-pressure and vacuum (negative-pressure) profiles are configurable within the selected pressure range. The differential pressure sensor carries a 4 MPa overpressure rating. Pressure repeatability is specified at ±0.5% F.S., and comprehensive pressure sensitivity is ±0.25% F.S. Pressure is displayed to three decimal places, with selectable units including kPa, bar, Pa, PSI, mmHg, mmH₂O, MPa, mbar, kgf/cm², and atm.
In medical device production, verified seal integrity is directly tied to patient safety and regulatory compliance. The D550 electronic leak tester is deployed on assembly lines for intravenous catheters, pre-filled syringes, insulin pen components, surgical instrument housings, respiratory masks, and sterile barrier packaging. Electronic pressure regulation delivers consistent set-point repeatability across multi-shift operation, reducing operator-dependent variation that can affect pass/fail consistency. The 64-channel memory allows line technicians to switch between product families in seconds, while Excel-format data export supports batch traceability records required by quality management systems. The instrument uses clean compressed air or nitrogen meeting ISO 8573-1 or JIS B8392-1 grade as the test medium, avoiding contamination of medical-grade components during testing.
The electronic model adjusts test pressure through internal digital valves controlled from the touchscreen, with no manual knobs on the front panel. The mechanical model uses two rotary knobs for vacuum and pressure adjustment. Electronic regulation provides higher set-point repeatability and supports digital recipe recall across 64 parameter channels.
No. The D550 does not offer wireless remote control. Test start and channel switching can be triggered through wired external I/O signals, PLC connection, or barcode scanner input.
At a 1000 Pa test range, measurement accuracy is 0.15% F.S ±1 Pa; at 5000 Pa, it is 0.15% F.S ±10 Pa. The actual detectable leak rate depends on test pressure, part internal volume, and test cycle time.
The instrument stores up to 50,000 test records internally, queryable by date or channel. Data can be exported through USB, Ethernet, or RS485 in Excel-compatible format for quality documentation and batch traceability.
