Precise interface level sensor in the decanter: Overview of impedance bar probes for process automation

• Continuous, impedance-based interface level measurement between two immiscible liquids (e.g. organic/aqueous) in decanters and separators
• Interface level bar probes Industry Process measurement technology for automation
• Measuring principle: Impedance measurement via real-time recording of electrical properties (conductivity, dielectric constant), non-capacitive.
• Used for precise phase position determination in emulsions, phase inversion and changing process conditions
• Continuous real-time measurement of the interface height without moving parts; insensitive to depositsand coatings.

Fast interface level – measurement for demanding chemical processes with Swiss precision

Process-specific rod probes for continuous real-time separation layer detection

The Aquasant rod probe is the reliable partner for precise interface measurement and continuous phase separation in complex chemical applications. Developed for use in decanters and separators, this bar probe impresses with its robust design made of stainless steel, alloy or tantalum and a highly resistant coated measuring electrode.

Especially in processes with emulsions and phase inversions, which often occur in chemical extractions, the rod probes ensure reliable, long-lasting performance and measurement accuracy.

Why is precise detection with the interface level bar probe crucial?

Product phase mixing leads to considerable costs and contamination of the organic phase

Process optimization is essential for time-saving, efficient production. The degree of automation with the continuous interface rod probe in the decanter allows the continuous product separation to be operated autonomously. The continuous feed flow into the decanter is controlled by the overflow and the regulated outlet via a control valve in the lower phase.

Advantages of the interface level sensor for maximum process control

The continuous interface rod probe type: STMd-R, ensures precise detection and control of the phase height in the separator. This automatic adaptation to specific process requirements enables you to optimally control the phase separation and thus significantly increase the efficiency of your decanter processes. Seamless integration into your existing process infrastructure ensures minimal downtime and rapid implementation.

General advantages

• Highest measuring accuracy for any conductivity
• Real-time interface measurement
• Insensitive to emulsions & coatings
• Ex ia certified for zone 0/1 for substance group IIC T6
• Maintenance-free thanks to optimized design
• Customized length (up to 6 m)
• Ideal in mono and multi-purpose systems

High-quality materials for extreme conditions

The interface rod probes are designed to function reliably even under extreme conditions. The combination of stainless steel or alloy and an FFKM double sealing system and a Teflon measuring electrode offers exceptional resistance to aggressive chemical environments. This makes the STMd-R sensor the ideal choice for demanding applications where reliability and longevity are critical.

Customized selection options

The process conditions set the path.
The chemical product type and process parameters such as pressure and temperature are decisive for probe materialization and dimensioning.
Decanter dimensions determine the process connection, active measuring length and total length. The basic requirement of 100% product coverage of the active measuring range must be met.
The 4-rod reference electrode includes the measuring field lines of the impedance measurement.

Blog article Interface detection

Specifications

• Physical measuring principle: Impedance
• Process connections: Flanges or threads (metric/inch)
• Process pressure: 0.5 to +40 bar
• Measuring range: 40 to 3000 mm
• Temperature: -20 to +170 °C
• 2-wire technology
• ATEX Ex ia-approved for zone 0/1

Application variants of interface level sensor

Aquasant sensors are designed and produced exclusively in-house. The process conditions and products of the system are taken into account. We define the optimum sensor through personal consultation and process queries.

• High-temperature ceramic SKMd rod probe up to 170°C
• Full PTFE STMd-T rod probe for aggressive products
• SGK rod probe mini glass sensor for mixer-settler applications
• Product compensated STMd rod probes of one phase
• SEM rod probe with glass-lined measuring electrode for high temperature application
• Interface detection clamp sensor for glass apparatus

Areas of application

Continuous separation processes of organic and aqueous phases in decanters and columns in the chemical and pharmaceutical industries, oil-water separation in refineries

• Chemicals
• Petro Industry
• Pharmaceuticals
• Production
• Refinery

“Learn more about precise interface measurement and optimize your phase separation with the STMd bar probe. Contact us now for an individual consultation and maximize the efficiency of your chemical processes.”

– Managing Director

Overview of the various interface level sensor

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STMd SB T TN DN

Interface - level full Teflon rod probe in decanter for aggressive liquids

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