Worried about World War 3 and the Ebola Outbreak? You might want this cool Radiation Detector.
Geiger Muller tube: SBM-20-01 (2 pcs.)
Measuring Method: Gaseous Ionization
Range of indicated background radiation level: from 0.03 to 1,000 μSv / h
Range of indicated background radiation level: from 3 to 100,000 μR / h
Operating temperature range: from -20 to +60 ºC
Ultra fast response (9 - 10 seconds for a reading)
Stores data for up to 3 years
Transfer data to your PC or MAC
Resale value on eBay seems to be about 70% of MSRP used. That is excellent.
Cannot measure energy of radiation - no spectrographic information
Will not measure high radiation rates due to dead time
Sustained high radiation levels will degrade fill gas