A baby sensor is both a monitor and alarm for a baby's movements and sounds.

Baby sensors

A biosensor is a device to detect or measure certain molecules.

Biosensors

A blood pressure monitor measures blood pressure.

An electrocardiograph monitor records cardiac rhythm

A fitness tracker monitors and records measurements of fitness.

A heart monitor measures and tracks cardiac rhythm.

A medical alert device is a personal emergency response system.

A pulse oximeter measures the blood oxygen level.

A sleep tracker monitors and charts degrees of  sleep.

Smart glasses bring information to the wearer alongside with what is seen.