Z-Wave Philio Multisensor - PIR / Light / Temp - Gen5PIR (Motion) Monitors changes in infrared level and movement that indicate a persons presence. The Philio PSP01 3 in 1 Z Wave Sensor combines a PIR (Motion) sensor with a light sensor and a temperature sensor, all in one small package. The detector includes three sensors. Light Level sensor Measures a room's light level (LUX) and reports this to the Z Wave network Temperature sensor The sensor's Lithium battery should give you more than 2 years of use