Durridge RAD7 Radon Detector


Durridge RAD7 Radon Detector is a portable detector that gauges radon and thoron concentrations in water, soil, and air. Usually used for vapor intrusion entry points and gushers, RAD7 can also be used to inspect soil or groundwater contagion.

Applications: professional radon testing, mitigators, mines, deserts, ocean, and volcanoes exploration.

50 in stock

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Country : Germany

Product Description

Durridge RAD7 Radon Detector is a truly flexible radon and thoron detector used by research scientists and experts worldwide. Its mature and yet still state-of-the-art design surpass those of the most expensive radon measurement tools in the world. The device comes with a built-in air pump, rechargeable batteries, and a separable wireless printer. The RAD7 can store large quantities of radon data for later printing and/or for graphing and analysis.

The RAD7 is a Sniffer that identifies the 3-minute alpha decay of a radon particle, without intervention from other radiations. It also recognizes the instantaneous alpha decay of a thoron daughter for a fast thoron measurement. The instrument can sniff for access points and radon gushers, and it regains from high radon exposures in minutes. The RAD7 also works as a  Continuous Radon Monitor and can measure the EPA action level of 4 pCi/L, with a 10% average deviation, in under two hours. The detector prints out a complete report at the end of each run.

Features of Durridge Radon Detector:

  • Processes EPA action level of 4 pCi/L in less than two hours.
  • All-in-one complete, compact, portable unit in a tough holding case.
  • The device commands you step by step, so you can do what you want to do.
  • Programmed set-ups for often-used tests.
  • Audible radon and thoron counts let you hear the hot spots.
  • Easily transportable: The RAD7 weighs up to 4.35 kg.
  • Radon data is displayed, printed, and downloaded in your selection of units.
  • Resistance to a build-up of 210pb.
  • RS-232 port and USB adaptor assure flexible connectivity.

Additional Information

Weight 5.5 kg
Model RAD7
Operating Temperature
Operating Humidity
Radon Concentration Range 0.1 - 20,000 pCi/L (4.0 - 750,000 Bq/m3)
Cycle Range 2 minutes to 24 hours for, 1 to 99 to unlimited, per run
Measurement Accuracy +/-5% absolute accuracy, 0% - 100% RH
Nominal Sensitivity SNIFF mode, 0.25 cpm/(pCi/L), 0.0067 cpm/(Bq/m3), NORMAL mode, 0.5 cpm/(pCi/L), 0.013 cpm/(Bq/m3
LCD Display Output 2 line x 16 characters, alpha-numeric display
Infrared Printer Omniprint OM1000 Wireless Infrared Printer included
Battery Longevity 24 hours in SNIFF mode; 72 hours in Monitor mode
Built-In Air Pump Nominal 1L/min flow rate, Inlet and outlet Luer connectors
Connectivity RS-232 port up to 19,200 baud rate, USB adaptor is included with every RAD7
Case Material
Intrinsic Background 0.005 pCi/L (0.2 Bq/m3) or less, for the life of the instrument
Recovery Time Residual activity in Sniff mode drops by a factor of 1,000 in 30 minutes
Power Supply


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