Precise interface measurement in the decanter: Overview of impedanz rod probes

Efficient interface – measurement in decanters – the impedance rod probe with Swiss precision

Fast interface measurement for demanding chemical processes.

The rod probe from Aquasant Messtechnik is your reliable partner for precise interface measurement and continuous phase separation in complex chemical applications. Developed for use in decanters and separators, this rod 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, as often occur in chemical extractions, the rod probes guarantee reliable, long-lasting performance and measuring accuracy.

Why is precise interface measurement crucial?

Mixing product phases 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 measurement by means of an impedance 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 interface phase control for maximum process control

The continuous interface measurement of the STMd-R rod probe 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 optional alloy as well as an FFKM Chemraz 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.

Functional principle of impedance measurement

Precision in measurement – differentiation of liquid phases

Different media have different measured impedance values. Upper and lower phases are measured. The measured value of the upper phase is stored as the zero point of the active electrode area. The STMd rod probes use state-of-the-art measurement technologies to accurately determine the impedance, conductivity and dielectric constant (DK) as a sum signal of your process media. These precise measurements make it possible to accurately identify and differentiate between different liquid interfaces – from insulating to highly conductive substances. This gives you valuable insights into your processes and allows you to continuously optimize the efficiency and quality of your phase separation.

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

Application variants of impedance rod probes

Aquasant sensors are designed and manufactured exclusively in-house. The process characteristics and products of the plant are taken into account. Through personalized consultation and process analysis, we define the optimal sensor.

• 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

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

– Managing Director