| Feature |
Hydrogen Flux |
Coupons |
ER Probe |
LPR |
Electro-Chemical Noise |
Ultrasonic Scan |
FSM-IT |
Intrusive |
No |
Yes |
Yes |
Yes |
Yes |
No |
No |
Shut Down to Install |
No |
Yes |
Yes |
Yes |
Yes |
No, except for safety reasons |
No, except for safety reasons |
Retrieval Limitation |
None |
Shut down/ pressure |
Shut down/ pressure |
Shut down/ pressure |
Shut down/ pressure |
None |
None |
Corrosion Inhibitor Monitoring |
Yes |
No |
No |
No |
No |
No |
No |
Multi-phase Corrosion Monitoring |
Yes |
No |
No |
No |
No |
No |
No |
Can be Used in High Temperature Environments |
Yes (320F/160C) |
Limited |
Limited |
Limited |
Limited |
Limited |
Yes |
| Can be Used in High Pressure Environments |
Yes |
Limited |
Limited |
Limited |
Limited |
Yes |
Yes |
| Service Environments |
All, except high O2 environments |
All |
All |
Conductive aqueous |
Conductive aqueous |
All |
All |
| Presence of Electrolyte |
No |
No |
No |
Yes |
Yes |
No |
No |
| Area of Coverage |
Section |
Point |
Point |
Point |
Point |
Point / Section |
Point / Section |
| Continuous Monitoring |
Yes |
No |
Yes |
Yes |
Yes |
No |
Yes |
| Satellite Communication |
Yes |
No |
No |
No |
No |
No |
Yes |
| Cost |
Installs easily, labor-free data retrieval |
labor intensive to repeat |
expensive due to loss of production |
expensive due to loss of production |
very expensive - device & loss of production |
labor intensive to repeat |
expensive & labor intensive to install |
