Microwave vs PIR Sensor, Which Should You Choose? For outdoor floodlights with sensors, both are more common types, and the final choice depends on these factors.
To detect motion, microwave sensors don't need a precise line of sight. Therefore, they are more suitable for oddly shaped rooms and areas with many obstacles. They also don't rely on thermal signals, making them more reliable in hot environments where PIR sensors may not be effective. Microwave sensors are also significantly more sensitive, making them ideal for situations where very little motion must be detected.
Advanced controls can also allow precise settings for a parking lot or warehouse lighting layouts. In these cases, advanced control and precise sensing are required, making motion sensors a viable option.
On the other hand, PIR sensor lights are much more efficient for garden and home protection. However, they may not be suitable for placement in very open areas.
PIR sensor lights are often the best choice for outdoor security lighting. Because they only detect motion from living bodies, they are less likely to cause false positives. Microwave sensors, on the other hand, can be configured to only detect the movement of objects the size of a human body, although this is usually done before the sensor is put into the light.