Moisture Measurement in Sugar Beet Pulp: A Reliable Approach with the Liebherr Litronic FMS II
19 May 2026
In modern sugar processing, accurate moisture measurement of sugar beet pulp is critical for ensuring product quality, optimising drying efficiency, and maintaining process control. However, not all measurement technologies perform equally well in challenging industrial environments. This case highlights how the Liebherr Litronic FMS II provided a robust and reliable solution where other technologies fell short.
The Challenge: Limitations of NIR Technology
The customer initially relied on a Near-Infrared (NIR) moisture measurement system. While widely used, NIR technology can be highly sensitive to environmental conditions. In this application, several limitations became apparent:
- Dependence on ambient light conditions, leading to inconsistent readings
- Sensitivity to product colour variations, affecting accuracy
- Low penetration depth, making it difficult to measure true bulk moisture
The Task: Accurate, Real-Time Moisture Monitoring
The application required precise and continuous moisture measurement of sugar beet pulp under real process conditions:
- Measurement directly on an inclined conveyor belt after the dryer
- Real-time moisture value display for operators on site
- Integration with the plant’s control system via analogue output for monitoring and control
Additionally, the customer required full transparency, with all measurement data recorded and logged to ensure traceability and process optimisation.
The Solution: Liebherr Litronic FMS II
To address these challenges, a tailored solution using the Liebherr Litronic FMS II was implemented at the customer’s site in Frauenfeld.
Key Steps in Implementation
1. Determining the Optimal Installation Location
A suitable measuring point was identified on the inclined conveyor belt after the drying stage to ensure representative moisture readings.
2. System Selection and Configuration
A complete measurement system was configured, including:
- Capacitive moisture sensor(s)
- Evaluation unit
- Dedicated software
- Accessories such as sliding shoes to ensure consistent material contact
3. Installation and Mechanical Integration
The sensor was installed using a sliding shoe directly on the conveyor belt. This setup ensures stable and continuous measurement, even with varying material flow.
4. Parameterisation and Commissioning
The system was configured on-site using an RS232/RS485 converter. Fine-tuning during start-up ensured accurate calibration to the specific product and process conditions.
5. Data Integration and Logging
- Continuous data logging provides full transparency of the process
- Moisture values are transmitted directly to the plant’s control system
- Operators benefit from real-time display and monitoring
By switching to the compensated capacitive measurement technology of the Liebherr Litronic FMS II, the customer achieved:
- Consistent and accurate moisture readings, independent of ambient light and colour
- Deeper penetration into the material, reflecting true bulk moisture
- Improved process control through reliable analogue outputs
- Enhanced transparency with comprehensive data logging
This application demonstrates the importance of selecting the right measurement technology for demanding industrial environments. While NIR systems may be suitable for certain conditions, capacitive systems like the Liebherr Litronic FMS II offer clear advantages in bulk material applications such as sugar beet pulp.
For operators seeking reliable moisture measurement and improved process efficiency, this solution provides a proven path forward—combining robust hardware, intelligent integration, and complete process visibility.