The EKMC1601111 from Panasonic is a standard detection type passive infrared motion sensor in TO-5 package. This sensor detects change in infrared radiation which occurs when there is a movement by a person or object by the change in surrounding temperature. There are several conditions to sense target such as temperature difference between target and surrondings should be 4°C, movement speed is 1m/s and target size is 700mm x 250mm. Typical applications include lighting, anti crime devices, home appliances, commercial equipments, audio and visual devices.