Building a Geiger Counter
A while ago I bought a DIY Arduino Geiger Counter kit from ebay and a SBT-11A Russian Geiger counter tube. The SB-11A is a very sensitive alpha tube, comparable to the LND 7317 in some ways. It also seems sturdier and is certainly cheaper. The data sheet gives: 44-49 cps/uR/sec, so the CPM to uSv/h