Strain gauge training system (FL 100)

basic introduction to measurement with strain gauges



  • Strain gauges are used extensively in sensor systems to detect forces, moments and deformations.
  • The FL 100experimental unit provides a wide-ranging introduction to the fundamentals of measurement by strain gauges.
  • Three test specimens for tension, bending and torsion are each fitted with four strain gauge measuring points.
  • The strain gauges are wired in the full bridge.
  • The specimens are loaded incrementally allowing for the strain reading to be sequentially monitored.
  • The specimens can be inserted quickly and precisely into the frame.
  • The strain gauge measuring range is protected by a Plexiglas cover, which also makes it clearly visible for inspection purposes.
  • The measuring amplifier supplies the bridge supply voltage, and displays the load-dependent “bridge detuning” digitally in voltage values.
  • The digital display also features a zero balancing function to allow for any preloading.
  • The various elements of the experiment are clearly laid-out and housed securely in a storage system.
  • Three additional tension bars are available as accessories, in brass (FL 100.01), copper (FL 100.02) and aluminium (FL 100.03), enabling the modulus of elasticity to be ascertained in experiments.

Technical Details:


  1. experimental unit investigating the fundamentals of strain gauge measurement
  2. tension, bending and torsion tests each with strain gauge measuring points in full bridge circuit
  3. strain gauge application areas protected by Plexiglas cover
  4. steel test bodies
  5. measuring amplifier with 4-digit digital display
  6. frame to house the measuring objects
  7. determination of modulus of elasticity on various materials using measuring objects FL 100.01, FL 100.02, FL 100.03
  8. storage system to house the components

Technical Data:

  • Tension bar:
    • measuring length: 50mm
    • cross-section: 2x10mm2
    • modulus of elasticity: 191000N/mm2
    • Poisson’s ratio: 0,305
  • Bending bar:
    • length: 385mm
    • cross-section: 5x20mm2
    • modulus of elasticity: 210000N/mm2
  • Torsion bar
    • length: 500mm, Ø=10mm
    • shear modulus: 80000N/mm2
  • Weights
    • small: 10x 0,5N, 1x 1N (hanger)
    • large: 1x 5N, 2x 10N, 1x 20N, 1x 5N (hanger)
  • Strain gauge measuring point: full bridge, 350Ω
  • Amplifier:
    • measuring range: ±24mV
    • resolution: 1µV
    • zero balancing adjustment range: ±1mV
    • supply voltage: 10VDC
  • Frame opening W x H: 480x450mm
  • 230V, 50Hz, 1 phase
  • 230V, 60Hz, 1 phase; 120V, 60Hz, 1 phase
  • UL/CSA optional

Dimensions & Weight:

  • L x W x H: 560x410x610mm (frame)
  • L x W x H: 600x400x320mm (storage system)
  • Weight: approx. 20kg

Learning Objections/Experiments:

  • fundamentals of measuring with strain gauges
  • strain gauge types and application techniques
  • calculation of the mechanical deformations under tension, bending and torsion
  • correlation between mechanical strain and electrical resistance in a strain gauge
  • with FL 100.01, FL 100.02, FL 100.03: determination of the modulus of elasticity for various materials from the measuring data of a tensile test

Scope of Delivery:

  • 1 frame
  • 3 strain gauge test specimens
  • 2 sets of weights
  • 2 hexagon socket wrenches
  • 1 measuring amplifier with strain gauge connecting cable
  • 1 storage system with foam inlay
  • 1 set of instructional material


  • test bars for tension, bending and torsion with strain gauge measuring points as full bridge
  • universal 1-channel measuring amplifier


  • optional:

–      FL 100.01 Tension bar, brass

–      FL 100.02 Tension bar, copper

–      FL 100.03 Tension bar, aluminium


Due to the continuous development of our products, the goods supplied may vary in detail to that illustrated on this Website.