Outdoor PIR+MW Motion Sensor Bosch OD850 — dual-technology passive infrared and microwave detection

Bosch OD850 is an outdoor dual-technology motion sensor that combines passive infrared (PIR) and microwave (MW) detection to provide reliable perimeter and exterior protection. The sensor detects moving heat sources with PIR and verifies motion patterns with microwave Doppler measurement, reducing false alarms from environmental changes. The compact weather-resistant housing is designed for mounting on external walls, posts or near gates and entryways and integrates with common alarm control panels for timely intrusion alerts.

Advantages

The dual-technology approach mixes PIR sensitivity to thermal contrast with microwave coverage to confirm movement, which improves detection accuracy and reduces nuisance activations caused by wind, rain, small animals or swaying vegetation. The unit's outdoor-rated enclosure and adjustable detection zones simplify installation and alignment on different mounting positions. Compatibility with standard alarm systems and a design focused on perimeter protection make it suitable for both residential and light commercial exterior applications.

Suitable for

• Perimeter detection around residential properties
• Monitoring gates, driveways and entryways
• Exterior protection for small commercial buildings
• Areas where false alarms must be minimized (vegetated or windy sites)

Key specifications

• Detection technology: passive infrared (PIR) combined with microwave (MW) Doppler sensing
• Coverage: designed for outdoor perimeter and exterior zones (adjustable detection pattern)
• Environmental resistance: weather-resistant housing suitable for exterior installation
• Mounting options: external wall, post or corner mounting with alignment adjustments
• Integration: outputs compatible with common alarm control panels for intrusion monitoring

How to use

Mount the sensor on a stable surface at the recommended height and orientation so the detection pattern covers the intended perimeter or approach path. Adjust the detection zones and sensitivity according to site conditions, following installer guidelines for PIR and microwave balance to minimize false triggers. Connect the output to the alarm control panel using the proper wiring and configuration; test detection coverage after installation by walking through each monitored zone and verifying alarm signals through the control system.

Recommendations

For optimal performance, position the sensor to avoid direct exposure to sprinkler spray, heavy foliage in the immediate field of view, and reflective surfaces that could affect microwave measurements. Perform routine functional tests and periodic cleaning of the sensor window to maintain reliable detection. When installing in high-wind or heavily vegetated areas, reduce PIR sensitivity and fine-tune microwave parameters to balance detection and immunity to nuisance activations.