RD200 is a Smart Radon Detector made in South Korea. The RD200 has 20 times higher sensitivity than the other handy radon detectors. RD200 has the dual structured pulsed-ionization chamber system and highly accurate detection circuit designed by FTLab’s own technology. A time for the first reliable data display is just <1 hour, so no longer need to wait a long time, 24~48hours.