- Use of gamma rays is non- destructive methods commonly referred as Radiation Attenuation Densiometer (RAD), used in Nuclear & Oilfield industries.
- A radioactive source induces Compton scattered beam, and rays are attenuated by fluid of certain density.
- Relatively inexpensive
- Errors due to geometry
- Increasing thickness of pipe as gamma rays are used.
- Isolation against radioactive source