BOSCH OD850-F1 security motion detector 50 ft by 50 ft

Outdoor motion detector for perimeter security

The Bosch OD850-F1 is a 10.525 GHz detector that combines passive-infrared and microwave sensing to identify human movement across a 50 ft by 50 ft outdoor zone. Its sealed optical chamber protects against wind and insect interference so the unit remains reliable in exposed locations. Two pre-programmed sensitivity levels let installers match the detector to the site without complex programming. The dual-technology approach reduces false alarms caused by swaying vegetation or small animals.

All-weather operation with low false-alarm rate

Microwave and PIR signals must both trigger before an alarm is registered, which keeps nuisance activations to a minimum in rain, wind or temperature swings. The sealed chamber prevents dust and moisture from degrading sensor performance over time. Power consumption stays modest because the microwave module only operates during the verification window. Installers can select the lower sensitivity preset for busy backgrounds or the higher setting for clear perimeters.

Replaces single-technology outdoor sensors

Sites that previously relied on PIR-only units and suffered frequent false trips from foliage or wildlife gain a measurable improvement without rewiring the same mounting points. The upgrade is worthwhile when environmental noise makes single-technology detectors impractical and a 50 ft by 50 ft coverage pattern matches the protected area. Facilities needing longer ranges or narrower curtains will need a different detector format.