The NukAlert Automated Radiation Measurement Station (ARMS-2) is designed to be mounted on a roof to continuously monitor radiation levels. It contains dual radiation detectors that provide concurrent measurements of radiation in the air ("Cloud Shine") and on the ground ("Ground Shine"). The ARMS-2 can automatically shut off a building's HVAC system when radiation levels reach a user-defined threshold to protect occupants from radiation exposure. It measures radiation from 1μR/hr to 700R/hr without saturating below 1,000R/hr and sends alerts and data to emergency response agencies.