Endress+Hauser Density Calculator QML51 – Accurate Inline Density Measurement with Vibronic Technology
The Density Calculator QML51 is an advanced evaluation unit designed for continuous inline measurement of liquid density, reference density, concentration and media detection using proven vibronic measurement technology. It works together with Liquiphant vibronic sensors equipped with integrated density electronics to provide reliable process data directly from tanks and pipelines.
By replacing traditional manual sampling and laboratory analysis, the QML51 helps operators achieve faster process monitoring, improved consistency and better control of production processes.
Real-Time Density and Concentration Measurement
The QML51 calculates density values based on the vibration characteristics of Liquiphant sensors immersed in the process medium. The system can continuously determine important liquid parameters without interrupting the process.
Key capabilities:
Density measurement
Reference density calculation
Concentration measurement
Intelligent media detection
Continuous inline monitoring
Real-time process information
The calculator can operate with up to two Liquiphant vibronic sensors, providing flexibility for different measurement requirements.
Vibronic Technology for Reliable Process Monitoring
Unlike traditional laboratory-based density testing, the QML51 provides direct measurement inside the process line or vessel.
The system uses proven vibronic measurement technology, where the resonance behavior of the sensor changes according to the density of the surrounding liquid. This allows reliable measurement even in demanding industrial environments.
Typical advantages include:
No manual sampling required
Continuous measurement instead of periodic testing
Faster response to process changes
Improved production consistency
Reduced laboratory workload
Compensation for Temperature and Pressure Effects
To improve measurement accuracy in real operating conditions, the QML51 can compensate for influences caused by temperature and pressure changes through integrated sensor information.
This makes it suitable for industrial processes where density values need to remain stable despite changing operating conditions.
Flexible Solution for Different Industries
The modular design of the QML51 allows it to be adapted to various liquids and process requirements through different Liquiphant sensor options.
Typical applications include:
Chemical concentration measurement
Batch reactor monitoring
Mining slurry concentration measurement
Lime milk density measurement
Food and beverage media detection
Life sciences process monitoring
Liquid composition analysis
Better Process Control Without Laboratory Delays
In many production processes, density is an important indicator of product quality and concentration. Traditional methods often require samples to be collected and analyzed in laboratories, creating delays between process changes and measurement results.
The QML51 provides continuous inline density data, helping operators monitor process conditions immediately and make faster adjustments.
Frequently Asked Questions
What is the Endress+Hauser QML51 used for?
The QML51 is used for continuous inline measurement of liquid density, reference density, concentration and media detection with Liquiphant vibronic sensors.
Which sensors are used with the QML51?
The QML51 works with compatible Liquiphant vibronic sensors with integrated density electronics.
Can the QML51 measure concentration?
Yes. The QML51 provides concentration calculation functions in addition to density and reference density measurement.
Why use inline density measurement instead of laboratory analysis?
Inline measurement provides continuous real-time process information, reducing the need for manual sampling and improving process control.
Which industries can use the QML51?
The QML51 is suitable for chemical, mining, food & beverage, and life sciences applications where liquid density or concentration monitoring is required.
