[ RadSafe ] WikiSensor - iPhone rad detector

Mark Ramsay mark.ramsay at ionactive.co.uk
Thu Nov 3 14:51:00 CDT 2011

For 'fun' I will download this later and test against one of my known sources 


Sent from my iPhone

On 3 Nov 2011, at 19:15, "Hansen, Richard (CONTR)" <HansenRG at nv.doe.gov> wrote:

> Has anyone tried this product?
> I have not tried it and am not endorsing it, just wondering if anyone has checked to see how well it works.
> WikiSensor dosimeter
> http://wikisensor.com/
> This is a software application for the Apple iPhone that uses the video camera ("Facetime" camera above the screen) to measure gamma and x-ray radiation. The camera lens is covered with opaque tape (such as black "electrical tape"). In a low radiation background area, the software measures the camera pixel "hits" in thirty seconds. This is used as the reference level subtracted from future measurements. Then, when the user selects a measurement, a 30 second measurement is made and the net pixel hit counts (measurement minus reference level) is converted into a rate in microsieverts per hour. Video shows tests with I-131 and Tc-99m.  A PDF file (in French) is also available for download showing counts from a "Cesium" and "Cobalt" sources.
> Best regards,
> Rick
> Rick Hansen
> Senior Scientist
> CTOS - Center for Radiological/Nuclear Training at the Nevada National Security Site
> National Security Technologies, LLC (NSTec)
> Contractor to the United States Department of Energy
> hansenrg at nv.doe.gov<mailto:hansenrg at nv.doe.gov>
> www.ctosnnsa.org
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