Ultra-low-cost radiation monitoring system utilizing smartphone-connected sensors developed with internet community

Yang Ishigaki, Ryo Ichimiya, Yoshinori Matsumoto, Kenji Tanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)


We developed a series of inexpensive mobile radiation detectors, which we have named Pocket Geiger (POKEGA), to address the desire of ordinary people to own a radiation detector following the March 2011 Daiichi Nuclear Power Plant accidents in Fukushima, Japan. In order to reduce costs while maintaining accuracy and flexibility, we used a combination of a PIN photodiode detector connected to a smartphone via a microphone cable. The detector circuit design was optimized for simplicity and low cost, while the smartphone software application was tasked with handling the complex processing required. Furthermore, the device also utilized the GPS and networking capabilities of the smartphone for logging and data sharing. The 137Cs measuring range for a POKEGA equipped smartphone is approximately from 0.05 μSv/h to 10 mSv/h, which covers most radiation levels measured in Japan. Approximately 12,000 POKEGA units were shipped in the six months following its release, and more than 1,800 users have joined a Facebook community where they report measurement results and discuss hardware and software improvements.

Original languageEnglish
Title of host publicationIEEE SENSORS 2012 - Proceedings
Publication statusPublished - 2012
Event11th IEEE SENSORS 2012 Conference - Taipei, Taiwan, Province of China
Duration: 2012 Oct 282012 Oct 31

Publication series

NameProceedings of IEEE Sensors


Other11th IEEE SENSORS 2012 Conference
Country/TerritoryTaiwan, Province of China

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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