Mineral raw materials
Liebherr has been developing measurement systems for industrial automation since 1985. Our sensors reliably determine the moisture in various materials. The benefit of Liebherr measurement systems is high precision thanks to 40 measurements per second, as well as the sensors' reproducibility. The systems can be integrated in various production facilities such as on conveyor belts, upstream and downstream of dryers, at transfer points, in hoppers but also in pipelines or tanks. Our systems measure, monitor and regulate the humidity or water content automatically and in real time the continuous measurement guarantees high precision.
Sensors are developed and manufactured at the Liebherr-Mischtechnik GmbH location in Bad Schussenried (Germany). Here, we produce and calibrate the sensors in an environment protected against ESD.
Reliability that promotes trust
We test each sensor over the entire working temperature range in a process that takes several hours.
When Liebherr started producing sensors, we used the measurement systems that we developed ourselves only in our own concrete mixing plants. Here, the sensors are used to determine the sand moisture in the process. For this task, we developed sensors that work reliably even under extreme outdoor conditions. Our experience in concrete technology pays off for our customers: Liebherr sensors measure precisely and have a long service life.
Examples of uses for mineral raw materials
Moisture determination in sand
Installed in the outlet of a silo, the Liebherr moisture measurement system determines the moisture continuously or, if required, in batches.
Moisture determination in sand
Installed above a conveyor belt of a concrete mixing plant, the sensor glides over the sand by means of sliding shoe carriages. The dead weight of the slide creates a uniform contact pressure; this is advantageous for determining the moisture.
Moisture determination in iron ore
The Liebherr moisture measuring sensor is also convincing in extremely abrasive materials.
Moisture determination in ceramic powder
The FMS II moisture measurement system enables efficient editing directly during operation. Before further processing, the humidity is measured and the measured values are transmitted to the higher-level control.
Moisture determination in quartz sand
Whether installed directly on the quartz sand or mounted under the conveyor belt, the humidity sensor from Liebherr always determines the exact moisture in the sand.
Moisture determination in shards/broken glass
From old to new. Used glass is returned to the cycle and sparkles in new splendour as glass containers in any shape.
Moisture determination in excavated soil
Reliable moisture measurement with Liebherr sensors and associated evaluation unit in gravel, clay and also loam.
Moisture determination in clay in the brickworks
If the material flows are sometimes very uneven, the sliding shoe carriage can be weighted down with ballast.
This will give very good and reproducible results.
Use in sludge drying
To avoid under and over-drying, Liebherr moisture measurement determines the exact moisture in-line during the process. The measured values can be transferred directly to the dryer control.
These products are available for uses in the field of mineral raw materials.
Litronic FMS P78
Thousands of sensors are reliably in use worldwide by this sensor in a wide variety of materials and industries.Find out more
Litronic FMS P30-S
The smallest of the sensors was specially developed for confined spaces and impresses with its compact design. We offer suitable weld-on fittings for use in pipelines.Find out more
Litronic FMS P80-CAN
Our CAN-capable sensor sends the signals directly to the customer's control and is processed on site.
The plug-in sensor is specially designed for on and off-road applications, vehicles in construction and agricultural areas as well as in engine applications.Find out more
Determination of the water content in liquids (emulsions/oils) and bulk solids in explosion-protected areas is possible with our WMS product family.Find out more
Litronic FMS II Evaluation and transfer module
The modular design allows networking of up to 16 sensors on one evaluation unit. Extensive signal processing options for transfer to a higher-level control and the exact and fast calibration of the measured sections are just some of the many advantages.Find out more
Litronic FMS IV Evaluation and transfer module
To meet the requirements of our customers, the new generation of the evaluation unit is based on ProfiNet data transmission. With the Ethernet standard, you and we react more flexibly and quickly to new and special requirements in process automation.Find out more
Further information and downloads
- Energy and environment:Rock, gravel, sand, fly ash, recycled glass (shards), biomass, shredded plastics (fluff)
- Building materials industry:Sand, quartz sand, recycled glass, soda, MVA, fly ash, ores, minerals, dusts, cinders, various aggregates, moulding sands, raw meal, filter cakes, ceramic powder, coke, charcoal, FGD gypsum, talc, chalk, silt, clay, mineral and aluminium granulate, slurries
We will be happy to send you the relevant job reports on request.
- CCS planar sensor data sheet (PDF, 160 KB)
- P30-S planar sensor data sheet (PDF, 192 KB)
- P78 planar sensor data sheet (PDF, 147 KB)
- P78-E21 planar sensor data sheet (PDF, 257 KB)
- P78-E22 planar sensor data sheet (PDF, 207 KB)
- P80-CAN planar sensor data sheet (PDF, 246 KB)
- Litronic FMS highlights (PDF, 246 KB)