A breathing or movement monitor typically uses a sensor pad under the mattress, or a wearable sock/clip, to alert you if movement stops for an unusually long period. They’re marketed as reassurance tools, not as SIDS prevention devices.
It’s worth being clear-eyed here: no monitor is a substitute for safe sleep practices — back sleeping, a clear cot, correct room temperature, and a firm flat mattress remain the evidence-based basics recommended by health bodies, with or without a sensor.
Nanny BM-03 Medically Certified Baby Sensor Breathing Monitor
£199.99
If a breathing monitor genuinely helps you sleep better as a parent, that has real value — but it’s worth choosing one with good reviews on false-alarm rates, since a monitor that cries wolf constantly tends to get switched off, which defeats the purpose.