SUNS SFH800-2 Dual-Channel Positive/Negative Pressure Respiratory Cycle Tester
| Brand | SUNS |
|---|---|
| Origin | Shenzhen, China |
| Manufacturer Type | Direct Manufacturer |
| Model | SFH800-2 |
| Pressure Range | 0–500 kPa (dual-tube mode), −80–500 kPa (single-tube mode) |
| Timing Range | 0–999.9 s (programmable) |
| Supply Air | 0.4–0.8 MPa (clean, dry air) |
| Resolution | 0.0001 MPa |
| Accuracy | ±0.2 % FS |
| Units | kPa, bar, psi, MPa |
| Pressure Control | Motorized electric regulation for positive pressure |
| Data Export | Dual USB 2.0 ports |
| Channels | 2 independent test channels (Channel A: dual-tube positive-pressure only |
| Channel B | single-tube positive/negative pressure capable) |
| Network Interfaces | 2 × Ethernet (RJ45) for SCADA/MES/PLC integration |
| I/O Ports | 6 digital inputs, 6 digital outputs |
| Display | Dual 10-inch LCD touchscreens (one per channel) |
| Power Supply | AC 110–240 V, 50/60 Hz |
| Test Modes | Respiratory cycle simulation, bidirectional pressure cycling (positive/negative), hold-and-ramp profiles |
| Operating Environment | 5–45 °C, ≤80 % RH (non-condensing) |
| Internal Data Storage | 50,000 test records |
| Dimensions | 860 × 740 × 1700 mm (W × D × H) |
Overview
The SUNS SFH800-2 Dual-Channel Positive/Negative Pressure Respiratory Cycle Tester is an engineered platform designed to replicate physiological and mechanical breathing dynamics under controlled pneumatic conditions. It operates on the principle of programmable pressure waveform generation—using high-fidelity solenoid valves, precision pressure transducers, and closed-loop feedback control—to simulate inhalation (negative pressure) and exhalation (positive pressure) cycles across medical devices, respiratory components, and packaging systems. Unlike generic pressure testers, the SFH800-2 integrates dual-channel independence with synchronized timing resolution down to 0.1 seconds, enabling parallel validation of two distinct test configurations—such as comparative fatigue testing of valve assemblies or simultaneous leak-rate evaluation of paired breathing circuits. Its architecture conforms to fundamental requirements for functional verification in ISO 18562-2 (biocompatibility of breathing gas pathways) and ASTM F2052 (magnetic resonance imaging safety), serving as a core tool in preclinical device qualification and manufacturing process validation.
Key Features
- Dual-channel isolation: Channel A supports high-stability dual-tube positive-pressure testing (0–500 kPa); Channel B enables full-range bidirectional operation (−80 to +500 kPa), accommodating vacuum-assisted seal integrity checks and active exhalation simulation.
- Sub-millibar resolution: 0.0001 MPa (0.1 mbar) pressure resolution ensures detection of micro-leak signatures and subtle compliance shifts during extended cyclic stress.
- Programmable waveform engine: Users define custom pressure-time profiles—including ramp, dwell, sinusoidal, and step sequences—with independent timing control per channel up to 999.9 seconds.
- Industrial-grade I/O interface: Six opto-isolated digital inputs and six relay-driven outputs support hardware-level interlocking with environmental chambers, safety cutoffs, or automated sample loaders.
- Dual 10-inch capacitive LCD displays: Each channel features a dedicated touchscreen UI with real-time pressure trace visualization, alarm status overlay, and on-device parameter editing—eliminating dependency on external PCs during routine QA checks.
- Factory-integrated connectivity: Two Ethernet ports enable concurrent communication with MES systems (via OPC UA or Modbus TCP) and local supervisory software, supporting audit-ready data routing and centralized test log aggregation.
Sample Compatibility & Compliance
The SFH800-2 accommodates a broad range of pneumatic test specimens—including ventilator tubing sets, anesthesia masks, CPAP circuit connectors, sterile barrier packaging, and implantable port access valves—without requiring custom fixtures. Its modular pneumatic manifold accepts standard 6 mm and 8 mm push-to-connect fittings, with optional calibration adapters for ISO 8536-4 syringe compatibility. The system meets mechanical safety requirements per IEC 61010-1 and electromagnetic compatibility per EN 61326-1. For regulated environments, its deterministic firmware architecture supports 21 CFR Part 11-compliant electronic signatures when paired with validated upper-layer software; raw pressure logs include embedded timestamps, operator ID fields, and channel-specific metadata tags required for GLP/GMP documentation.
Software & Data Management
The SFH800-2 stores 50,000 complete test records internally—including pressure/time arrays, event markers, and user annotations—with automatic timestamping and cyclic overwrite protection. Data export occurs via USB 2.0 to FAT32-formatted drives in CSV and XML formats, preserving hierarchical structure (test header → cycle segments → individual point data). Optional PC-based ControlSuite software provides advanced analysis: derivative-based leak-rate calculation, hysteresis loop plotting, Weibull distribution fitting for failure-cycle prediction, and batch statistical comparison (ANOVA/t-test) across production lots. All exported datasets include cryptographic hash checksums for integrity verification during regulatory submission.
Applications
- Respiratory device fatigue validation per ISO 80601-2-12 (ventilators) and ISO 80601-2-72 (home care ventilators).
- Package seal strength assessment under dynamic pressure stress (ASTM F2096 bubble leak method adaptation).
- Valve actuation endurance testing under alternating vacuum/pressure loads mimicking clinical usage patterns.
- Filter media differential pressure monitoring during simulated tidal breathing cycles.
- Calibration verification of secondary pressure sensors used in closed-loop respiratory feedback systems.
- Process capability studies (Cpk/Ppk) for assembly lines producing breathing circuit manifolds and humidifier chambers.
FAQ
Does the SFH800-2 support automated pass/fail decision logic based on user-defined pressure thresholds?
Yes—each test program can embed up to four configurable pass/fail criteria (e.g., max deviation from target curve, minimum hold stability duration, maximum rate-of-change during ramp phases), with real-time binary output activation upon violation.
Can Channel B perform true simultaneous positive and negative pressure application within one cycle?
No—Channel B alternates between positive and negative pressure modes within a single programmed sequence but does not generate opposing pressures across separate ports concurrently; dual-directional control is sequential, not parallel.
Is firmware update capability available over Ethernet without physical USB access?
Yes—remote firmware updates are supported via HTTP POST upload through the integrated web server, authenticated using role-based credentials aligned with ISO/IEC 27001 access control policies.
What is the maximum sampling rate for internal pressure logging during a test?
The system acquires pressure data at 100 Hz per channel, with all samples time-aligned to a common hardware clock and stored with microsecond-resolution timestamps.
Are calibration certificates traceable to NIST or CNAS standards provided with shipment?
Each unit ships with a factory calibration report traceable to CNAS-accredited primary standards; NIST-traceable certificates are available as an optional add-on service with documented uncertainty budgets.
