Infrared and Ultrasonic RADAR

The unit emits infrared light
and ultrasonic sound waves,
which it then monitors for any reflected signal.

It displays the results via a LED display
and has adjustable sound output.
Its range is approximately .5 - 4 meters.

Many investigators carry and use infrared break beam and PIR motion detectors on investigations. I do not believe a spirit or ghost could activate these sensors as the former system requires a solid body to break a beam and the latter sensor is designed to react to human body heat.

My system transmits its own infrared light and detects any reflected light