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Weighing Technology

Coperion K-Tron's Digital Weighing Technology for Gravimetric Feeding, Batching and Metering

Accurate feeding, batching and metering of bulk solids in the process industries starts with precision scales. The Smart Force Transducer with vibrating wire weighing technology is an all-digital load cell designed for the most demanding feeder and batch scale applications.

The SFT II/III represent the leading edge of process weighing technology and form a solid foundation for the continuing evolution of the art and science of weighing.


  • 100% digital design, no calibration required
  • Advanced single wire weighing technology
  • Resolution of 1:4,000,000 in 80 ms
  • Weight captured, linearized and temperature compensated 112 times per second
  • Zero data loss measurement
  • Integrated force reduction
  • Digital low-pass filter reduces effect of plant vibration
  • Waterproof and dust tight
  • Stand-alone RS485 network connected for multiple load cell systems
  • On-board microcontroller, custom frequency processor, calibration memory and voltage regulator
  • Hazardous area models available for European (ATEX) and North American (NEC) standards

More than Three Decades of Innovation

In 1976 Coperion K-Tron introduced the process industry‘s first truly digital load cell. After three decades and fivegenerations of innovation and development, Coperion K-Tron‘s Smart Force Transducer technology continues to set the standard for the industry. Advanced single-wire design, high resolution, internal force reduction, and 90% fewer parts combine to provide the highest possible levels of performance and reliability. The SFT II Medium and Large are employed in all Coperion K-Tron’s platform and three-point suspension scale loss-in-weight feeding systems.

The SFT III is optimized for direct, single-point weighing and is used in Coperion K-Tron’s Smart Weigh Belt Feeders, K4G Blender, and Smart Flow Meters.

Learn How Coperion K-Tron SFT Technology Delivers High-Precision Weighing

picture of Principles of Operation

Vibration Immune Weighing

Achieving high gravimetric feeding performance on the process line requires discriminating between weight data and the contaminating effects of inertial forces induced from ambient vibration and shock. Coperion K-Tron’s exclusive dynamic digital filtering algorithm continuously identifies and extracts spurious inertial components from the weight measurement, even in severe process environments.

picture of Weigh Sensor Output

Download SFT technical paper - PDF - 8 pages (requires registration)

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