Digitalising the moisture measurement of bulk solids
App-controlled microwave measuring method. Franz Ludwig GmbH specialises in the measurement of moisture in bulk solids in a wide range of applications.
Building material manufacturers, glass and chemical plants are among the internationally orientated customer base. Agriculture is also a growing field of activity with regard to smart farming and the associated automation of work processes. This very long and intensive involvement with the subject of moisture measurement in industrial applications in terms of precision, durability, robustness and user-friendliness predestines Ludwig to develop and manufacture the moisture measurement technology described below.
The microwave measurement method, which has been tried and tested for years and operates in the 433 MHz frequency range, serves as the basis for the measurement technology. It utilises the dielectric constant of water, which has a permittivity value of µr 80. This number indicates how strongly electric fields propagate in materials. Due to the high permittivity of water, the microwave measurement method is suitable for determining the moisture content of bulk materials. Different medium and ambient temperatures have no influence on the precision of the microwave measurement method described.
The unique selling point of these sensors, which can be used in both mobile and fixed installations, is their ability to network intelligently and wirelessly with end devices or process controllers. They support plant operators and planners in configuring systems based on the Industry 4.0 standard.
The output signals can also be provided in both analogue and digital form. Thanks to their high computing power, the sensors are able to deliver usable measurement results even under the most difficult conditions, such as when measuring very small quantities in mixing and dosing processes. Parameterisation can be carried out via a terminal device independent of the manufacturer, as the access point (website) is implemented in the sensor.
Reliable measurements conveniently via app
An app is available for smartphones with Android operating systems; Windows operating systems are also supported. By using this technology, the customer benefits from the latest software developments and can update them at any time. Existing and familiar electronic devices such as tablets and smartphones can be used to operate the measuring sensors, which also represents an economic and ecological aspect.
The realisation that the use of apps significantly simplifies the use and operation of electronic systems, making it much less complicated for the operator, has led us to this development. This WLAN technology ensures safe operation/parameterisation by technical personnel outside of any danger zones. A software function is available for continuous recording of the sensor signals received, which enables subsequent precise analysis of measurement and process sequences.
