Non-contact and maintenance-free sensor for measuring volume flow

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The BulkscanĀ® LMS511 uses time-of-flight technology for non-contact measurement of volume flow on conveyor belts. Using the multi-echo technology, the Bulkscan can combine time-of-flight data with the belt speed to generate a reliable volume flow signal, regardless of the bulk material's properties or weather conditions. Aside from calculating total quantities and mass flow, the Bulkscan can monitor the operation of the conveyor belt without coming into physical contact with it and promptly gives warning of any belt slippage. The integrated center-of-gravity calculator can be used to detect uneven loading of the bulk material and avoid excessive belt wear. Its tough industrial housing is well suited to rugged operating conditions. An integrated heater also ensures safe operation at low ambient temperatures. Discrete signals as well as Ethernet TCP/IP modules can be used to connect the measuring system to a host communication system.

Product features

  • Non-contact measurment of volume and mass flow of bulk material
  • Laser pulses with high angular resolution ensure outstanding image resolution
  • 5-echo pulse evaluation produces highly reliable measurements
  • Offers non-contact belt monitoring
  • Integrated center-of-gravity calculator
  • Robust structure for harsh ambient conditions
  • Can also measure at low temperatures thanks to integrated heater
  • Compact housing with enclosure rating IP67

Customer benefits

  • Maximizes conveyor throughput
  • Reduces maintenance costs by preventing belt slippage
  • Increases the conveyor belt's service life
  • Reduces loading time
  • Increases efficiency by optimizing belt capacity
  • Simple installation
  • Low maintenance costs
  • Offers savings through minimized energy consumption


  • Monitors volume flow of raw materials in the food industry
  • Monitors transport equipment used in coal and ore production
  • Loading systems and bag filling equipment
  • Measures ash discharge in power plants
  • Load checks for freight trucks, ships, train carriages, etc.
  • Measures volume and mass in gravel plants and other production sites in the building materials industry
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