Precise Level Measurement when weighing Lime Powder
Dusty, abrasive production environments and limited space – the cement industry places high demands on measurement technology. Precise level measurement and weight detection ensure product quality and optimize the production process. High dust exposure, extreme temperatures, and confined installation spaces require robust sensors that deliver long-term precision.
Reliable empty detection: The side-mounted RFnivo® ensures a smooth material supply
A globally operating German building materials company successfully uses the capacitive point level sensor RFnivo® RF 3100 from UWT for empty detection in lime powder weighing systems. These weighing systems are essential for the precise dosing of material to ensure the desired product quality.
Application Challenges
Low Dielectric Constant: Lime powder has a dielectric constant of just 1.6 to 2.0, making detection with conventional sensors difficult.
Limited Installation Space: The confined space within the weighing system requires compact sensor solutions.
Strong Material Build-Up: Fine particles tend to adhere to sensor surfaces and container walls.
Electrostatic Charging: High particle movement and low humidity can cause signal interference.
UWT Solution:
The sensor was installed laterally in the weighing system as an empty detector and reliably signals when the material level falls below a defined threshold. This allows precise control of material supply and ensures uninterrupted production.
This solution ensures precise empty detection and optimises the entire production process. With its combination of reliability, low maintenance, and easy integration, it guarantees high operational safety.
The RFnivo® - RF 3100 is not only ideal for use in lime powder weighing systems but also for numerous other bulk material applications in the building materials and cement industry, such as:
- Point level detection in raw meal and cement silos
- Empty detection in dosing and mixing systems
- Level monitoring in transport containers
Advantages of the RFnivo® 3000
Precise measurement despite low dielectric constants: Capacitive measurement technology enables reliable detection even for materials with challenging electrical properties, ensuring that even the finest particles are accurately recorded.
Resistant to material build-up thanks to intelligent signal processing: Innovative signal processing prevents measurement errors caused by adhesions and guarantees long-term, consistent measurement quality.
Hermetically sealed housing for dust protection: The robust design prevents dust ingress, ensuring reliable operation in demanding environments.
Compact design for tight installation spaces: The sensor can be flexibly mounted, making it particularly suitable for systems with limited space.
No signal interference from electrostatic charging: The measurement technology is designed to remain unaffected by external influences such as electrostatic charges or humidity.
Simple commissioning: Automatic calibration and uncomplicated parameterisation via display and buttons.
What makes the RFnivo® so versatile and reliable
in detecting bulk solids?
The RFnivo® capacitive point level sensor is specifically designed for use in storage and process containers. It functions as a full, demand, and empty detector for a wide range of bulk materials with a dielectric constant (DK) of 1.5 or higher. It can be installed vertically, horizontally, or at an angle. Its robust construction enables reliable operation in demanding environments, making it a versatile solution for various applications.
Application Areas and Technical Specifications
The RF 3100 is designed for use in various industrial processes and offers the following features:
Wide range of applications for bulk materials such as cement, flour, sand, granules, and powders.
High temperature and pressure resistance, suitable for process temperatures from -40°C to +500°C and process pressures from -1 to +25 bar.
Robust design: The aluminium housing with IP67 protection rating ensures durability and reliability.
Versatile process connections: Available with various connection sizes, including M30, M32, G ¾", G 1", G 1½", and NPT threads, to meet diverse installation requirements.
Innovative Technologies for Reliable Measurements
The RF 3000 integrates advanced technologies to ensure high performance in challenging applications:
"Active Shield" technology makes the sensor resistant to material build-up by compensating for interference, ensuring precise measurements.
Automatic calibration simplifies installation and commissioning, as the sensor adjusts itself to specific operating conditions.
Optional PFA full coating provides additional protection in corrosive environments, expanding the sensor’s range of applications.
Visual Level Monitoring with the NivoLED® Signal Lamp
In the dusty environment of the lime powder weighing system, the combination of the RFnivo® capacitive level switch and the signal light provides a clear and reliable level indication. Traditional indicators are often difficult to read under these conditions – the dual-colour LED signalling offers a simple and effective solution.
Clear signalling at a glance
Green: Normal operation – no immediate action required
Red: Critical condition – container empty (for this application example) or full, requiring prompt intervention
A key advantage is the simple integration: The NivoLED® can be directly connected to the RFnivo® switching signal without complex wiring or additional installation effort. Thanks to its built-in explosion protection, it is also ideally suited for use in dust-explosive environments.
The visual level indication minimises production downtimes, reduces the risk of overfilling or material shortages, and enhances process safety – ensuring an economically optimised and uninterrupted material supply.
