Detector with quad element pyroelectric and microwave sensor, pet immune, with integrated EOL (End Of Line) resistors. Uses a special volumetric lens with a PIR Quad sensor, a planar microwave lens that uses the Doppler effect, and a new electronic system based on ASIC technology, optimised to eliminate false alarms triggered by pets (Quad Linear Imaging Technology for accurate analysis of body dimensions and differentiation from background and pets of up to 25kg), selectable AND/OR operation, integrated balance resistors which can be selected by means of jumpers for simplified installation, high degree of immunity to visible light, range of 15m with 90° aperture, temperature compensation, selectable pulse counter, installation height 1.8m to 2.4m with no need for calibration, operating temperature -10°C to +55°C, dimensions 117x60x37 mm, weight 105g.