FT-S Microforce Sensing Probes from FemtoTools


The FemtoTools FT-S Microforce Sensing Probes are microforce sensors capable of measuring forces from millinewtons (10-3 N) down to several nanonewtons (10-9 N) along the sensors’ probe axis. Both compression and tension forces can be measured. The FT-S Microforce Sensing Probes are designed for the integration into one of the FemtoTools Micromechanical Testing Systems, such as the FT-FS1000 Mechanical Probe.

The FT-S Microforce Sensing Probes represent the highest level of precision and sensitivity in the micro- and nanodomains. The individual calibration in combination with an outstanding long-term stability guarantees significantly higher measurement accuracy than any other force sensing system in this force range. A calibration data sheet is delivered for each individual sensor.

Available in the following configurations:

Sensor Force Range Force sensing direction Resolution @10Hz
FT-S100 ± 100 µN axial 0.005 µN
FT-S1000 ± 1000 µN axial 0.05 µN
FT-S10000 ± 10 000 µN axial 0.5 µN
FT-S1000-LAT ± 1000 µN perpendicular 0.05 µN

Compatible Measurement Systems

  • FT-FS1000 Mechanical Probe
  • FT-RS1000 Microrobotic Station
  • FT-FS5000 Compression Tester
  • FT-FS8000 Biomechanical Lab
  • FT-RS5000 Microrobotic Station


  • Unique force sensing range (5 nN to 10 mN)
  • Optimized technology for microforce sensing (parallel sensor motion/no tip slippage)
  • Fast microforce sensing: can measure force at a bandwidth of up to 8 kHz
  • Sensors are individually calibrated which results in unmatched accuracy
  • Repeatable outputs during its entire lifetime (no performance degradation)
  • Insensitive to changes in the environment (temperature, humidity)
  • Low output signal drift (highly stable)
  • Low cross-sensitivity to off-axis forces (highly selective)
  • High aspect ratio, customizable sensor probes
  • Sensor probe can be set to an electric potential
  • 300% full-scale overload protection
  • Air, liquid and vacuum compatible (application inside a SEM)

Typical Application

MEMS testing

  • Stiffnessmeasurements onmicro-resonators
  • Electromechanical testing of micro-actuators (e.g. actuation-force, actuation-range)
  • Stiffness maps of pressure sensors
  • Cyclic or creep testing of e.g. polymer based MEMS structures


  • Mechanical testing of single cells
  • Protein fiber stretching
  • Measurements of interaction forces with microorganisms

Material Science

  • Bending testing for e.g. the extraction of Young’s modulus
  • Compression testing of CNT array
  • Mechanical characterization of microbeads
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