Radiation Detection Company (RDC) | 3,198 followers on LinkedIn. Radiation Protection For the Everyday Practice | RDC has provided world-class radiation monitoring since 1949. Our core values and dedicated staff have made us the top-rated dosimetry service on the market, with a +70 Net Promoter Score (NPS) based on feedback from our customers. We've provided friendly, reliable, headache-free radiation detection service at the cutting edge of radiation safety solutions for the last 75 years for over 31,000 organizations worldwide.