PIR IR Motion Sensors Panasonic PIR Motion Sensors are passive infrared-type sensors that detect changes in temperature (>,4°C) from the surroundings and detect movement. With a wide sensing area, the Panasonic PIR devices are low profile and available in polyethylene (9.7mm) and silicon lenses (6mm). The PIR motion sensors feature sleep mode, which allows for a low current consumption of 1µA. The EKMC series offers embedded circuit design and eliminates external sensing circuits.