Measure Exactly. Anywhere.
Continuous Radon/Thoron Monitors for Air, Water & Soil
Learn about the RAD7

Coronavirus Update

Monday, May 18, 2020: On behalf of the entire team at Durridge, we hope this message finds you and your loved ones in good health. Our best intentions and well wishes go out to our customers, colleagues, and friends around the world, especially those who may be directly affected. Durridge continues to take all the necessary actions and precautions recommended by federal and state authorities. We remain in operation, providing customers with price quotations, technical support, order processing, and product shipments, although you may experience some delays under the circumstances. Calibration and maintenance services continue to be provided at our US headquarters location. Our UK office also continues to provide these services but on a very limited basis. We will post the most current updates here on our homepage, so please check back often.

DURRIDGE Industry Leadership
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Over 5,000 RAD7s sold

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More than 2,500 published research papers utilizing RAD7

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Used on all 7 continents

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Shipped over 2,000 radon-in-water accessories

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Developed at MIT
Founded in 1997

Solutions to Common Questions
RAD7 Applications

Groundwater: Radon as a tracer,
thoron to identify discharge points

Radon Metrology and Measurement

Indoor Air Quality and Occupational Hygiene

Health Physics

Environmental Site Analysis

Volcano and Seismic Analysis

Particle Physics and Dark Matter Studies

Radon Testing and Mitigation

National Radon Safety Board Certified Radon Professionals
Download the Durridge presentation about radon measurement technologies
Have you ever wondered about how radon measurement technologies work? What are the advantages and disadvantages? Dr. Stephen Sadler, Chief Scientist at DURRIDGE, recently presented on this topic at the NORM IX conference. Download this presentation below.
Learn the differences in Pulse Ionization Chamber vs. Electrostatic Precipitation methods and when each is most appropriate.
Florida State University and Chulalongkorn University use RAD7s to research groundwater discharge in Thailand rivers.
Brush up on Radon as an Environmental Tracer. Read case study summaries on its use for groundwater/surface water interactions, vapor intrusion, and NAPL.
Download the presentation