The following table shows how different people use different conversion factors for the same tube. Who is right ?
| Geiger Tube | Isotope | CPM * conversion factor = μSv/h | Used by |
|---|---|---|---|
| LND 712 | 60Co
137Cs |
1/107 = 0.00926
1/120 = 0.00833 |
blackcatsystems GM10 |
| LND 712 | 60Co
137Cs |
1/123 = 0.00812
1/111 = 0.009 |
Nuova Elettronica Kit LX.1710 |
| LND 712 | 1/100 = 0.01 | cooking-hacks Radiation Sensor Board for Arduino |
|
| LND 712 | 1/429 = 0.00233 | libelium Wireless Sensor Networks to Control Radiation Levels |
|
| LND 712 | 1/429 = 0.00233 (up to June 9, 2011)
1/120 = 0.00833 (since June 9, 2011) |
pachube Geiger Counter Feeds from Asao Kawasaki |
|
| LND 712 | 1/429 = 0.00233 | geigermaps Create a new radiation feed to an open database |
|
| LND 712 | 137Cs | 1/123 = 0.00812 | Kansan 簡易なカウント数からシーベルトへの換算 |
| J305ß | 1/360 = 0.0027 | Youtube First tests with Arduino based Geiger sensor |
|
| J305ß | 1/123 = 0.00812 | cooking-hacks Radiation Sensor Board for Arduino |
|
| J305ß | 60Co | 1/123 = 0.00812 | Libelium (private email correspondence) |
| SBM-20 | 60Co
226Ra |
1/150 = 0.00664
1/198 = 0.00504 |
Nuova Elettronica Kit LX.1710 |
| SBM-20 | 60Co
226Ra |
1/150 = 0.00664
1/198 = 0.00504 |
Kansan 簡易なカウント数からシーベルトへの換算 |
| SBM-20 | 60Co
137Cs |
1/150 = 0.00664
1/171 = 0.00584 |
Libelium (private email correspondence) |
| SBM-20 | 1/175 = 0.0057 | cooking-hacks Radiation Sensor Board for Arduino |
|
| SBM-20 | 1/360 = 0.00277 | libelium Wireless Sensor Networks to Control Radiation Levels |
|
| SBM-20 | 1/360 = 0.00277 | youtube Enotria1 con Libelium primo start |
|
| Unknown | 1/360 = 0.00277 | Safecast |
Sapporo Radiation Levels 