Product Description
Ambulatory respiratory polygraphy systems for flexible home and hospital-based sleep diagnostics
The Stowood Visi Black Series—comprising Black Flash, Black Flash Plus, and Black Shadow—offers a family of compact, robust, and upgradeable ambulatory respiratory polygraphy recorders.
Designed and manufactured by Stowood in the UK for use in both home and clinical settings, each device includes integrated oximetry by Masimo, real audio recording, and wireless signal quality checking, all downloadable via Visi-Download software.
Models are available with single use or reusable consumables.
Built for flexibility and ease of use, the series allows clinics to start with entry-level screening and scale up to full-featured sleep diagnostics. All models meet or exceed the technical specifications set by the American Academy of Sleep Medicine (AASM).
Key Features
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Integrated oximetry by Masimo and nasal airflow
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Wireless signal quality check
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Real audio recording
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Compact and lightweight for patient comfort
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Compatible with multi-platform Visi-Download software
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Modular design with upgrade paths between models
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Durable and robust with low failure rates
Model Comparison
| Feature | Black Flash | Black Flash Plus | Black Shadow |
|---|---|---|---|
| Intended Use | Screening of sleep-disordered breathing | Diagnosis of sleep-disordered breathing | Diagnosis of complex sleep disorders |
| Oximetry | ✔ | ✔ | ✔ |
| Nasal Airflow | ✔ | ✔ | ✔ |
| Body Position | ✔ | ✔ | ✔ |
| Movement | ✔ | ✔ | ✔ |
| Sound Level | ✔ | ✔ | ✔ |
| High-Quality Audio Recording | ✔ | ✔ | ✔ |
| Respiratory Effort Channels | — | ✔ (2 channels RIP or piezo) | ✔ (2 channels RIP or piezo) |
| Thermistry | — | ✔ | ✔ |
| ECG | — | — | ✔ |
| Pulse Transit Time (PTT) | — | — | ✔ |
| Leg Movement Channels | — | — | ✔ (2 channels) |
| Auxiliary Ports | — | — | ✔ (4 ports) |
| Wireless Signal Check | ✔ | ✔ | ✔ |
| Visi-Download Software | ✔ Compatible | ✔ Compatible | ✔ Compatible |
| Upgradeable | ✔ (to Plus or Shadow) | ✔ (to Shadow) | — |
For Sleep Technicians
The Black Series devices are easy to apply, with minimal training required, making them ideal for home sleep study deployment. Patients find the devices comfortable and easy to wear, improving compliance and data quality. Technicians can wirelessly verify signal quality before deployment, and the Visi-Download software enables fast and intuitive review and scoring.
For Sleep Consultants
Consultants benefit from accurate, high-resolution recordings, and reliable automated scoring, reducing manual editing time. With scalable diagnostic capability across the range, the system supports a broad range of clinical requirements from OSA screening to almost full PSG-level analysis. Reports and raw data are accessible via Visi-Download for clear review and interpretation.
For Researchers into Sleep
Researchers can rely on the Black Shadow Series for multi-night, ambulatory sleep studies with configurable high-resolution signal acquisition. The modular design and availability of ECG, PTT, and movement channels in higher models offer flexibility in protocol design. Data is exportable into text files, spreadsheet and database for analysis, and robust hardware ensures long-term field use.
See our page ‘Research‘ for example papers published with this equipment.
