Table 1.

General sensor selection criteria for house environments. (FSR: force sensitive resistor)

Sensor Type	Location	Targeted Activity	Robustness	Efficiency
FSR	Under bed	Lying, sleeping	High	High
	Under couch	Sitting, lying	High	High
	Under chair	Sitting	Low	Medium
Photocell	In drawer	Kitchen activities	High	High
	Cupboard/Wardrobe doors	Bathroom activities, changing clothes	High	High
Digital distance	Back of chair	Sitting	Medium	High
	Toilet seat cover	Bathroom activities	Medium	High
	Above water tap	Bathroom/kitchen activities	Medium	Medium
Sonar distance	Walls	Activity related to presence in a room	High	Medium
Contact	Regular door	Activity related to leave/entering room/house, showering	High	High
	Sliding door	Showering, changing clothes	Medium	Medium
	Drawer	Bathroom/kitchen activities	Low	Medium
Temperature	Above oven	Cooking	High	Medium
	Near stove	Cooking	Medium	Low
Infrared	Around TV	Watching TV	High	Medium
Humidity	Near shower sink	Showering	Medium	Low
Pressure Mat	On bed	Lying, sleeping	Medium	High
	On couch	Sitting, lying	High	High
	On chair	Sitting	Medium	Medium
Vibration	In drawer	Kitchen activities	Medium	Low