Motion Detectors

Pick based on detection technology and mounting: passive infrared (PIR) is common for indoor human motion, microwave or dual-tech (PIR + microwave) for larger or outdoor areas, and ultrasonic for specialized indoor uses; also consider coverage angle, detection range, and whether you need wall, ceiling, or recessed mounting

For security prioritize reliable motion detection, tamper resistance, adjustable sensitivity, and compatibility with alarm panels; for automation prioritize connectivity (Wi‑Fi, Z‑Wave, Zigbee), low latency, power options, and easy integration with your hub or smart devices

Motion detectors in this category typically range from budget options under $50 to more advanced units over $150; lower-cost models cover basic PIR sensing while higher-priced units add dual‑tech sensing, extended ranges, weatherproofing, and professional-grade fittings

Common power options are battery-powered (easy to install, requires periodic battery changes), wired (hardwired to building power, more reliable for continuous use), and PoE or low-voltage; battery units are convenient for retrofit but wired units avoid downtime and may support more advanced features

Not all are; outdoor-rated detectors specify weatherproofing or an IP rating and use sensors and housings designed to resist moisture, dust, and temperature extremes—choose devices labeled for outdoor use for exposed installations

Accuracy depends on sensor type and placement; reduce false alarms by choosing the right sensor type (dual‑tech helps), adjusting sensitivity, avoiding direct sunlight or heat sources, mounting at recommended heights and angles, and keeping pets out of detection zones or selecting pet‑immune models

Regularly clean lenses, check and replace batteries as recommended, verify firmware or hub compatibility updates if networked, and test detection coverage periodically to confirm correct mounting and sensitivity settings