Truck Scale for Efficient Recycling Processes at Schlenter

SysTec Systemtechnik und Industrieautomation GmbH (Germany) – SysTec Weighing Indicators and MQTT Protocols in Operation

H.P. Schlenter GmbH operates a recycling facility in Würselen, Germany, where excavated soil, concrete residues, and demolition materials from large construction sites are received and processed. A PFREUNDT WK60 wheel loader scale with a web portal has already been successfully in use for some time.

Due to increasing material volumes and the need for consistent and transparent documentation of incoming and outgoing materials at the recycling facility, Schlenter recently commissioned SysTec partner PFREUNDT to build a stationary truck scale.

In this new system, the W&M approved SysTec IT3 weighing indicator handles the complete weight acquisition of the truck scale. It processes weighing signals, controls the weight display, and serves as the interface between the scale and the PFREUNDT web portal. Weighing operations are carried out via the web portal in both manual and self-service modes.

Key Facts:

• W&M approved pit-mounted truck scale (18 x 3 m)
• Robust SysTec weighing indicators for weight data acquisition in a monitoring container with (optional) operator station and for controlling the external large display
• Custom MQTT software developed by SysTec for communication with the PFREUNDT web portal

The Process:

The process begins with the creation of a master order in the web portal. All relevant information, such as the customer, material, or construction site, is thus stored in the system. 

When a company-owned dump truck loaded with excavated soil or demolition debris enters the site, it proceeds to the vehicle scale. An 18 x 3 meter in-ground truck scale has been installed, with the SysTec IT3 weighing indicator serving as a process controller. The driver operates the self-service terminal independently. He enters the order number and license plate. 

As soon as the vehicle is correctly positioned on the scale, the SysTec IT3 weighing indicator records the weight and transmits the data via the MQTT interface to the web portal. At the same time, the weight is displayed on the SysTec IT1 as a secondary display for the driver. 

Upon leaving the premises, a second weighing takes place to determine the net weight—again controlled and processed by the IT3 weighing indicator. The delivery note is displayed digitally, signed directly at the terminal, and printed. 

The entire process for the company’s trucks is fully self-service, without any permanently staffed weighing personnel.

With the introduction of the in-ground truck scale, Schlenter has consistently digitized and expanded its weighing processes. 

The SysTec IT3 weighing indicator serves as the central hub for precise, legal-for-trade weight recording and secure data transmission. The SysTec IT1 weighing indicator, acting as a secondary display, ensures transparency directly at the self-service terminal. Combined with the MQTT connection and full web portal integration, this has created a seamless solution that ideally combines efficiency, transparency, and future-proofing. The existing wheel loader scales and the new vehicle scale are integrated into a shared environment— with a unified user interface for all processes.

Outlook:

With additional camera technology, the system will be able to read and process vehicle license plates and capture images of the loaded material in the future.

Customer Benefits:

• Automated driver self-service weighing solution and staff-independent truck processing result in time and cost savings
• Accurate weighing of materials for billing purposes
• High reliability and robust industrial hardware: SysTec weighing indicators are ideal for continuous industrial operation
• Immediate and reliable transmission of data and in a structured format through the MQTT connection
• Reduced error rate through digital job linkage: the IT3 indicator transfers weighing data directly to order records in the PFREUNDT web portal
• Management of multiple scales (wheel loader and truck scale) with centralized data storage in the web portal
• A uniform user interface for all weighing tasks

Products:

• IT3 digital SysTec weighing indicator for recording weights from truck scales, with application software
• IT1 SysTec weighing indicator used as secondary displays at the driver self-service terminals
• Custom MQTT software developed by SysTec for communication with the PFREUNDT web portal