siemens
Siemens Milltronics MSI Belt Scale Weighing System
Model: 7MH7123-5AA
4-hour response · Pricing in SAR · Delivery across all KSA regions
7MH7123-5AA — Siemens Milltronics MSI Belt Scale Weighing System
The Siemens Milltronics MSI is a single-idler or dual-idler in-motion conveyor belt weighing system measuring the mass flow rate of bulk solids — including coal, limestone, iron ore, phosphate, cement clinker, grain, and sand — continuously on running conveyor belts. The MSI weighing system comprises a Milltronics weigh bridge frame with precision load cells spanning one or two conveyor idler stations, a belt speed sensor (either a tacho wheel on the belt or a tachometer on the head pulley), and a SIWAREX WC weighing integrator that computes the belt load (kg/m) from the load cell signals, combines it with the belt speed (m/s) to calculate mass flow rate (t/h), and integrates the instantaneous flow rate to produce the cumulative totalised weight (tonnes).
The SIWAREX WC integrator connects to the plant SCADA or PLC via PROFIBUS, Profinet, or Modbus RS-485, enabling real-time mass flow data to be used for process control (feed rate control to mills and crushers), production accounting (batch weighing), and custody transfer measurement at port loading and unloading facilities. The MSI's factory-developed automatic zero and span calibration procedures — using a static test weight or a calibration chain — allow accurate calibration without diverting the conveyor from production, minimising throughput interruption at continuously operating Saudi processing facilities.
In Saudi Arabia, the Milltronics MSI KSA is the standard belt weigher for limestone and raw meal feed rate measurement at Saudi Cement, YACCO, and Al Jouf Cement plants, phosphate ore weigh feed at Ma'aden and Mosaic-Saudi operations at Ras Al-Khair Industrial City, iron ore pellet feed measurement at Hadeed Jubail, and clinker weigh-feed to cement grinding mills across the Kingdom. Port bulk cargo loading and unloading facilities at Jubail, Dammam, and Jeddah use large-capacity MSI belt weighers (up to 2400 mm belt width) for vessel loading measurement and cargo billing. Grain terminal operators at Saudi ports use the MSI for OIML-certified grain custody transfer measurement during import discharge operations.
Razz Middle East supplies Milltronics MSI belt weighers with SIWAREX WC integrators, weigh bridge installation, speed sensor installation, PROFIBUS/PROFINET integration, and annual calibration services across Saudi Arabia.
Technical Specifications
Full specifications for the 7MH7123-5AA
- Accuracy
- 0.5–1.0% (OIML R50 Class 0.5)
- Belt Width
- 400–2400 mm
- Idler Span
- Single or dual idler
- Load Cells
- 2 per weigh frame (SIWAREX)
- Integrator
- SIWAREX WC
- Outputs
- 4–20 mA flow rate + pulse totaliser
- Communication
- PROFIBUS, PROFINET, Modbus RS-485
- Calibration
- Test weight or calibration chain
- Environment
- IP67 load cells and weigh frame
- Compliance
- OIML R50, CE
Key Features & Benefits
- OIML R50 Class 0.5 accuracy provides ±0.5% of total mass error over test period — meeting the legal metrology accuracy requirement for custody transfer belt weighing at Saudi port facilities and quarry output metering.
- SIWAREX WC integrator with PROFIBUS and PROFINET connectivity feeds real-time mass flow rate data directly to SIMATIC S7 PLCs and PCS 7 DCS for automated feed rate control to mills, crushers, and storage silos.
- Automatic zero and span calibration using calibration chain (test chain draped on the belt) enables calibration without stopping the conveyor, minimising production downtime at continuously operating Saudi cement and mining facilities.
- IP67 load cells and weigh bridge withstand the dusty, wet, and vibrating environments at cement plants, port terminals, and mineral processing facilities in Saudi Arabia's coastal industrial cities.
- Dual-idler configuration (MSI) provides higher accuracy than single-idler by averaging the load signal over a longer belt segment, reducing the influence of belt tracking variations on measurement accuracy.
- Pulse output provides the accumulated weight totaliser in engineering units for batch control systems at SABIC and Aramco bulk material handling facilities, directly triggering batch-complete setpoint comparators in PLC programs.
- Wide belt coverage from 400 mm to 2400 mm in a single product family covers everything from small-scale quarry output belts to the main port unloading conveyor systems at Saudi bulk import terminals.
Industrial Applications in Saudi Arabia
- Limestone and raw meal weigh-feed control to cement kiln preheaters at Saudi Cement, YACCO, and Al Jouf Cement plants, where PROFIBUS-integrated mass flow data drives the kiln feed rate PID controllers in the PCS 7 DCS.
- Phosphate ore flow measurement on main mine conveyors at Ma'aden Wa'ad Al-Shamal and Ras Al-Khair operations, where OIML R50 Class 0.5 accuracy provides the production accounting data for ore reserve depletion reporting.
- Iron ore pellet and DRI feed rate measurement to Hadeed steel plant at Jubail, where belt weigher data feeds the raw material charging controller that maintains correct charge mix ratios in the electric arc furnace.
- Port bulk cargo loading measurement at Jubail Industrial Port and Dammam commercial port, where large-diameter belt weighers on shiploading conveyors provide the custody transfer weight for vessel cargo documentation.
- Clinker feed rate measurement to cement grinding mills at Saudi cement plants, where MSI belt weigher data feeds the mill feed rate controller to maintain optimal mill loading and specific power consumption.
- Coal and pet-coke weigh-feed measurement at cement kiln firing systems, where accurate fuel feed rate control from the MSI belt weigher maintains kiln thermal input within the process optimisation window.
- Grain import discharge metering at Saudi port grain terminals, where OIML R50 certified MSI belt weighers provide the legal custody transfer measurement for imported grain cargo during vessel discharge operations.
Industrial Supplier in Saudi Arabia
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Frequently Asked Questions — 7MH7123-5AA
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