meross 10 Year Battery Smoke and Carbon Monoxide Alarm, LED Display Smoke CO Detector Complies with EN 14604 and EN 50291 Standards, Auto-Check, 85dB : Amazon.co.uk: DIY & Tools
Motorhome & Leisure Gas - Gas & Smoke Detectors - Carbon monoxide detectors - LPG Shop
FireAngel smoke alarm (bottom) and carbon monoxide detectors as fitted in modern caravans/ motorhomes fitted high up as the gases are lighter than air Stock Photo - Alamy
Campervan Carbon Monoxide Detectors // Van Life Safety