Attention: InspectorALERT can measure the alpha ray, too. However, I do not measure it outdoors. This is because a sensor is polluted and might malfunction. I cannot use the polluted sensor. A large amount of expense and long time are necessary for repair. The alpha ray does not measure the alpha ray before becoming the pollution area if polluted after all because I cannot measure it without the pollution of the sensor. This is because a comparison after the pollution is not possible if it is before pollution. The alpha ray is approximately unrelated to outside radiation exposure. You should suppose that there is the pollution by the alpha ray even if you do not measure an alpha ray anymore in the polluted area.
Natural Radiation measurement Purpose I measure the present natural radiation for the next nuclear plant accident beforehand. West Japan is a granite zone, and 0.1micro Sv/h usually has the radiation level. Location Josenji Temple Nishi-Kubo Town Onomichi City Hiroshima Pref. Date April. 28, 2012 Measurements Mr Gamma A2700 Csi(TI) Scintillation Counter Gamma only Measurements Inspector ALERT Beta+Gamma CPM Measurements TERRA MKS-05 Gamma only