Bosch Outdoor Tritech Detector, 
Model: OD850-F1
The OD850 Series TriTech ® detectors are for use outdoors and in other harsh environments. They use a combination of passive- infrared (PIR) and microwave detection with advanced signal processing. Motion Analyzer II PIR signal processing Linear travel distance (LTD) microwave signal processing Two sensitivity levels Timed relay output adjustable from two sec to 10 min