LIVE! Saint Louis Outdoor & Indoor Radiation Monitors


This is an EXPERIMENTAL live data feed from our outdoor and indoor "pancake" Geiger Counters
As of 1/12/15 we have switched to broadcasting over USTREAM
It may take a few moments of black screen for the live connection to establish

The displays now feature 48 hours of data, and sound. If our Geigers read above 120 cpm an alarm will sound. (see details, other important and disclaimers, and information below)

Broadcast live streaming video on Ustream

  • The graphs display up to 48 hours of  CPM (counts per minute) data based on minute by minute counts.
  • The "speedometers" display the current airborne alpha, beta and gamma radiation based on a 60 second moving average.
  • The detectors are located west of the Missouri River / Saint Louis airport at a height of approximately 10 feet above ground level.
  • The short term average reading of the outdoor Geiger is 40 counts per minute
  • The short term average reading of the indoor Geiger is 32 counts per minute.
  • Previous testing indicates that both Geigers provide similar readings when under similar conditions.
  • The Outdoor unit is located under an eve and has the "pancake" pointed downward
  • The Indoor unit is located in the center of our home above an HVAC air intake, (pancake pointed down)
  • As may be required, real time, short term updates MAY be found at the "CHAT" link contained in the video feed . 

The data presented may be inaccurate.
Until further notice, data should be considered as presented for educational purposes only.



    Larry monitoring rain in Charleston...previously reported.

    Still monitoring. A contact sent me this old paper about the radon rains I'm monitoring. The halflife fits my observations and we are assuming this is what we're measuring as it's very short lived.

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