Conductive Level Measurement

Point level detection in conductive liquids.

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Conductive Point Level Detection Liquipoint FTW33
Endress+Hauser
Conductive Point level detection Liquipoint FTW33
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Conductive Point Level Detection Liquipoint FTW31
Endress+Hauser
Conductive Point level detection Liquipoint FTW31
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Conductive Point Level Detection Liquipoint FTW32
Endress+Hauser
Conductive Point level detection Liquipoint FTW32
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Conductive Level Measurement

Conductive level measurement is a point-level technique that relies on electrical conductivity of the process liquid. One or more electrodes are installed at the desired trip points, and switching occurs when the conductive liquid completes an electrical path between the sensing electrode and a reference (vessel wall or dedicated reference electrode). The result is a discrete, repeatable indication of high level, low level, or multiple setpoints.

This approach is appreciated for its directness and high signal-to-noise behavior in suitable fluids. With no moving parts and a straightforward switching mechanism, it can be highly reliable in turbulent services, foaming conditions, and sumps where mechanical floats may be compromised. Multi-rod assemblies can provide several independent alarm points from a single nozzle, simplifying mechanical design.

Correct application depends on minimum conductivity and stable electrical referencing. Media selection is therefore critical: aqueous solutions, acids/alkalis, brines, and many CIP/SIP fluids are strong fits, while hydrocarbons and deionized liquids are typically unsuitable. Electrode material choice, insulation strategy, and mounting geometry are used to mitigate false switching from coating, bridging, or conductive build-up.

Conductive point level is frequently applied to pump control and protection (dry-run prevention), overfill alarms, and leak detection in containment sumps. It is common in water and wastewater processes, neutralization systems, utility skids, and chemical dosing where conductivity is inherent to the chemistry and rapid response is beneficial.

These switches interface cleanly with discrete inputs, safety relays, and packaged control panels, providing simple proof-testing and clear functional behavior. When specified with appropriate hazardous-area approvals and installation practices, conductive switching becomes a robust, low-complexity layer of protection for conductive liquid services.

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