This TriTech (intelligence) detector uses micro-doppler effect analysis, spectral analysis, dynamic thresholds adjustment, artificial intelligence etc.advanced analyzing and processing technologies for detection,providing good immunity to false alarms caused by pets. Through analyzing intellectually and quantifying on the infrared spectra from human body and the doppler frequency shift caused by human motion and then analyzing the background disturbance with comparing the background temperature, the detector reports alarms on human motion accurately with freedom from false alarms.Suitable for safety protection in houses, villas, factories, shopping centers, warehouses, office buildings, banks etc. places.microwave + passive infrared + artificial.