About Stowood
Pioneering Sleep Diagnostics Since 1992
Based in Oxford, UK, Stowood Scientific Instruments designs and manufactures advanced equipment and software for the diagnosis of sleep and breathing disorders.
For over 30 years we’ve supported NHS and private sleep services with clinically proven, easy-to-use diagnostic systems – from Black Shadow multi-channel recorders to Visi-Download 2 software.
Our solutions are built for clinicians, physiologists and researchers, combining accuracy, workflow efficiency and responsive UK-based support.
Why Sleep Professionals Choose Stowood
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30 + years of specialist experience in sleep diagnostics
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UK design, manufacturing and service for assured quality
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Complete diagnostic suite — oximetry, polygraphy & PSG
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Trusted partners including Embla (Natus), Viatom, and Masimo
Our Mission
To simplify sleep diagnostics, improve patient access to care, and empower clinicians with technology that delivers reliable, actionable insights.
Our Timeline
Innovation, Reliability, and Partnership in Sleep Diagnostics
Founded in 1992 by biomedical engineer Dr Lyn Davies, Stowood Scientific Instruments has spent more than three decades advancing the way sleep is measured, analysed, and understood. From our base in Oxford, UK, we design and manufacture our own Black Series ambulatory monitors, develop Visi-Download software, and distribute carefully selected diagnostic systems from partners in the USA and China.
Our products are trusted by NHS sleep services, private clinics, and research institutions worldwide for their accuracy, usability, and long-term reliability. Whether used in hospital sleep laboratories, home-testing programmes or academic research, Stowood systems help clinicians deliver faster, more confident diagnoses.
Built Around Clinical Needs
Every solution we develop is shaped by feedback from sleep physiologists, consultants, and technicians.
From bespoke system configurations and multi-bed PSG installations to integration with existing hospital IT, we ensure our tools fit real-world workflows. Our UK-based team provides knowledgeable support, training, and software updates — because reliable diagnostics require reliable people behind them.
Our Technology Portfolio
- Black Shadow multi-channel recorders – award-winning ambulatory monitoring
- Visi-Download 2 – gold-standard analysis software with many metrics
- Oximetry & Polygraphy systems from Viatom and Masimo
- Complete diagnostic pathway: screening → polygraphy → polysomnography
Sustainability & Responsibility
We’re committed to Net Zero operations, with UK-based manufacturing reducing transport emissions, renewable-energy offices, and carbon-neutral shipping. Remote support and training minimise travel, helping our partners meet their own sustainability targets.
Legacy & Leadership
Dr Lyn Davies was both an innovator and an engineer at heart – his love of motorbikes even inspired the names Grey Flash and Black Shadow. Today, under the leadership of his son CEO Dr Gwilym Davies, we continue his legacy of practical innovation and personal service, supporting clinicians with tools that combine precision and simplicity.
Supporting the Future of Sleep Medicine
We proudly sponsor the Lyn Davies Award, run jointly by the British Sleep Society and ARTP, encouraging research and innovation in sleep diagnostics.
Partner With Us
If you’re expanding home-based testing, upgrading your sleep lab, or developing new diagnostic pathways, our team is ready to collaborate.
Stowood – where innovation meets clinical excellence.