1 | Type of storage tank |
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| a. External floating roof | Possible | Possible | Possible |
| b. Internal floating roof | Impossible | Possible in some cases | Possible |
| c. Dome tanks | Impossible | Impossible | Possible |
2 | Available number of entry points | Ranges from 3 to 10 depending of tank diameter | Depends on required accuracy | No entry points at all |
3 | Type of crude oil | Light, Medium, Heavy: sometimes if this oil is heated, because of limitations on viscosity | Any type of crude oil | Any type of crude oil |
4 | Time of tool installation | Can range from 30 to 40 minutes on one entry point | 10 - 15 minutes on one entry point | No installation time |
5. | Time of inspection | 5 - 6 minutes for one entry point | 5 - 6 minutes for one entry point | Approximately 30 minutes for 50 m |
6 | Presence of personnel on roof | Yes | Yes | No personnel on the roof |
7 | Number of personnel on the roof | Max 3 operators | One operator | No personnel |
8 | Detection of intermediate layers | Not possible | Possible to get detail information om all intermediate layers | Possible to get the information of all intermediate layers |
9 | Tank in/out of operation | In operation | In operation | Does not matter |
10. | Potential accuracy of measured volume | ±5% (requires following many conditions and needs additional information). | ±8% for 20 entry points, ±10% for 15 entry points | 18% - 38%. Can be reduced to 14% - 24% |