Question: How long does it take to get a valid radon reading in a basement? Geiger counters can not detect radon gas because: a) Radon is radioactive because of radium that emits Alpha particles, which unlike Beta or Gamma, are "too large" and can be stopped by a sheet of paper or a layer of skin, hence they won't pass through the plastic case of the unit or the Geiger-Muller tube (the sensor) b) Activity within radon gas is very slow, with particle release every 2-3 hours, meaning there is very little data for the geiger counter to make its calculations. There are special Radon Gas detectors used for these purposes and can be found on Amazon for about $150. They are left in the basement overnight and readings are checked in the morning. https://griddownmed.files.wordpress.com/2015/04/pntrtn.gif see less By Quarta-Rad, Inc. SELLER on July 18, 2015
百来刀， 担心的买一个测一下。
俺家的自测值比买房时卖家测量值高50%。
http://www.amazon.com/RADEX-RD1503-Geiger-Counter-Model/dp/B005ZQ47AS/ref=lh_ni_t?ie=UTF8&psc=1&smid=ATVPDKIKX0DER
过节了，
再给家里填个礼物？ 俺正要买。俺家有个系统转了10几年了， 昨天下去看U型汞柱，读数还正常。
可是,有点贵.
Question: How long does it take to get a valid radon reading in a basement? Geiger counters can not detect radon gas because:
a) Radon is radioactive because of radium that emits Alpha particles, which unlike Beta or Gamma, are "too large" and can be stopped by a sheet of paper or a layer of skin, hence they won't pass through the plastic case of the unit or the Geiger-Muller tube (the sensor)
b) Activity within radon gas is very slow, with particle release every 2-3 hours, meaning there is very little data for the geiger counter to make its calculations.
There are special Radon Gas detectors used for these purposes and can be found on Amazon for about $150.
They are left in the basement overnight and readings are checked in the morning.
https://griddownmed.files.wordpress.com/2015/04/pntrtn.gif see less
By Quarta-Rad, Inc. SELLER on July 18, 2015