FLOW & LEVEL MEASUREMENT


Radiometric Density Measurement on Process Piping


Radiometric density measurement has become a dependable solution for industries operating under extreme process conditions. When high temperatures, pressure, corrosion, or abrasive media challenge conventional instruments, non-contact measurement provides a stable and proven alternative. Drawing on decades of field experience, VEGA supports these demanding applications with radiometric systems designed specifically for reliable density measurement on process piping.


The measurement principle Radiometric density measurement starts with a sealed gamma source that emits radiation through the pipe wall and process medium. A detector mounted on the opposite side measures how much radiation reaches it. As material density increases, more radiation is absorbed and less reaches the detector.


This predictable relationship – described by the Lambert-Beer


28 www.sosmagazine.biz April Issue 2026


law – allows the system to convert detector signals into precise and repeatable density values. Because the measurement is entirely external and non-contact, it remains unaffected by pressure, temperature, viscosity, or aggressive chemistry.


Compact detectors such as VEGA’s MINITRAC 31 and MINITRAC 32 are designed specifically for pipe mounting. Their slim form factor and rugged construction make installation practical even in tight or difficult-to-access process areas.


MINITRAC 31


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