The FemtoTools force sensing probes offer the highest level of precision and sensitivity in the micro- and nanodomains. These unique tools enable the recording of forces, both compression and tension, from millinewtons (10-3 N) down to sevaral nanonewtons (10-9 N)*.
*Unlike AFM cantilevers, which can be used to record force in the direction perpendicular to the cantilever axis, the unique FT-S force sensing probes record forces in the direction parallel to the probe axis.
Unique force sensing range (5 nN to 10 mN)
Fast: Can measure force at a bandwidth of up to 8 kHz
Optimized technology for microforce sensing (parallel sensor motion/no tip slippage)
Individually calibrated (more accurate than any other technique)
Insensitive to changes in the environment (temperature, humidity)
Low output signal drift (highly stable)
Low cross-sensitivity to off-axis forces (highly selective)
300% full-scale overload protection
Air, liquid and vacuum (SEM) compatible
No performance degradation & no change in calibrated sensitivity over more than 100,000 load cycles
The force sensing probe can be set to an electric potential
Convenient 0-5V analog output proportional to the applied force
Custom probe tips available (i.e. high aspect, sharpened, hardened)
The FT-S micro force sensors are designed to measure force changes with a resolution of better than one micro-Newton. This corresponds to the weight of only 0.1 mg. Unlike conventional force sensors based on strain gauges, the FemtoTools FT-S sensors use the principle of capacitive deflection measurement. Capacitive micro force sensing outranges strain gauge-based sensors and piezoelectric sensors in terms of stability, sensitivity and resolution. The sensing element of the FT-S sensor is fabricated using MEMS (micro-electromechanical systems) technology. Single crystalline silicon featuring superior mechanical and electrical properties is used as a base material.
áRequirements / Recommendations
Our Force Aquisition System (FT-SC01) is recommended for interfacing the sensors to your PC. However, some engineers choose to utilize their own suitable data acquisition system (stable 5V power supply and a high resolution 0-5V analog input).
A micromanipulator will be required to either position the sensor, or position your sample. A manipulator with a resolution (or minimum step size) of 0.25 microns is sufficient for most applications. If you're in need of a single- or multi-axis manipulator, an entire custom setup, or anything in between, we can help. Please contact us.