Servo Level Measurement

Servo Level Measurement

Servo level measurement is a high-precision tank gauging technology used for liquid level, interface, and density applications. It is strongly associated with inventory management and loss control where very high accuracy and traceability are required.

A small displacer is positioned in the liquid using a servo motor and suspended on a measuring wire wound onto a finely grooved drum. When the displacer contacts the liquid, buoyancy reduces its apparent weight; torque changes in the coupling are detected (e.g., via Hall sensor arrangements) and used to determine level with high resolution.

The technology is valued for measurement precision and for performance in custody transfer and inventory control environments. It is commonly aligned with industry requirements and approvals for tank gauging, supporting stringent accounting and transfer measurement expectations.

Typical applications include crude oil, gasoline, diesel, petrochemicals, and chemical storage where custody transfer accuracy is essential. Servo gauging is also used where interface tracking and density indication are needed to manage product quality, water bottoms, and operational transitions in large tanks.

Engineering work typically includes mechanical integration into tank roof nozzles, defining displacer selection for the fluid range, and ensuring calibration and verification practices align with site measurement governance. When applied in the intended service envelope, servo gauging provides a robust pathway to repeatable, high-accuracy level and interface data for tank farms and terminals.

Engineered Equipment Company, a leading supplier of specialized industrial equipment.