Coherence Loop, a chest-worn breath-and-heart monitor

Field notes

The proposed pendant combines two sensing methods: ECG-style measurement of beat-to-beat cardiac timing and electrical-impedance changes associated with breathing. Its software would compare those streams continuously rather than infer respiration from pulse alone. The page says Magnum Ltd is still prototyping the hardware and seeking early testers, and explicitly frames the device as wellness equipment rather than something intended to diagnose, treat, or prevent a condition.