Electromechanical Level Measurement

Electromechanical Level Measurement

Electromechanical level measurement applies a “sounding” principle for bulk solids: a sensing weight is lowered into a bin or silo on a tape or cable until it contacts the product surface, then rewound while the traveled distance is measured. The level is calculated from vessel geometry and the measured distance, delivering a reliable representation of material height even in heavy dust loading.

A key advantage is immunity to many of the factors that degrade non-contact methods in solids, such as dense dust clouds, poor reflectivity, or unstable filling conditions. Because measurement does not depend on dielectric constant or surface echo quality, performance remains stable across wide material variation - especially useful for sites handling multiple products in the same storage asset.

Selection centers on mechanical suitability: vessel height, inlet and outlet geometry, risk of product impact on the cable/tape, and expected bulk density and cohesiveness. Modern systems incorporate controls intended to avoid uncontrolled pay-out into outlets and to protect conveying equipment. As with any moving mechanism, cycle strategy, wear components, and access for service should be considered in lifecycle planning.

Electromechanical instruments are widely used in silos and bins storing grains, powders, plastic pellets, and mineral products, particularly where dust is extreme and where straightforward, cost-effective measurement is preferred. They are also a fit for very tall silos where other technologies may be range-limited or require elaborate echo management.

Integration typically supports standard analog signaling for inventory trending and discrete alarming for operational safeguards. With appropriate mounting and maintenance practices, electromechanical level measurement provides dependable solids level data in environments that are often hostile to purely electronic surface-sensing technologies.

Field Instruments & Controls, Inc. an exclusive authorized representative of sales and service for Endress+Hauser.