Table 1.

Connected sensory technology types^a and examples.

Sensor types	Definition	Example product (manufacturer)
Accelerometer	Senses change in person’s (or object’s) linear velocity	CentrePoint Insight Watch (ActiGraph)b Vivoactive 5 (Garmin)b
Gyroscopec	Senses change in angular velocity	Apple Watch Series 9 (Apple)b
Magnetometer	Measures angles relative to the Earth’s magnetic field	MetaMotion C (Mbientla)d
Pressure sensor	Measures external pressure	Blue Chip Pressure Mapping Mattress Sensor (Blue Chip Medical) Sensoria Mat Wheelchair Cushion (Sensoria) OpenGO Insoles (Moticon)
IMUe	Contains multiple sensors to measure motion in 3 axes; to accomplish this, IMUs include accelerometers, gyroscopes, magnetometers, and pressure sensors	Opal V2R (Clario) Xsens Awinda (Movella) MetaMotion C (Mbientla)d
Biomedical sensor	Measures physiological and biological metrics within the human body (heart rate, oxygen saturation, blood glucose, temperature, etc)	Omron Complete 2-in-1 Upper Arm Blood Pressure Monitor and 1-Leak EKG Monitor (Omron)
Temperature sensor	Senses heat and detect changes in temperature	SmartMat (Podimetrics)
Passive infrared sensor	Measures infrared light to detect motion	DomoCare home monitoring system (DomoSafety SA)

^aThis table does not include an exhaustive list of sensor types but rather includes more common examples used in health care.

^bThe CentrePoint Insight Watch, Vivoactive, and Apple Watch also contain a temperature sensor; the Vivoactive and Apple Watch also have biomedical sensors; the Apple Watch uses both an accelerometer and a gyroscope.

^cGyroscope and accelerometer are often used concurrently in products.

^dThe MetaMotion C system is an inertial measurement unit that contains a magnetometer in addition to an accelerometer and gyroscope.

^eIMU: inertial measurement unit.