The K3D35 3-axis force sensor is suitable for force measurement in three mutually perpendicular axes.
It features a particularly compact design with a diameter of 35 mm and a total height of only 28 mm.
The K3D35 3-axis force sensor is available for forces of 500 mN, 2 N, and 10 N. It is particularly suitable for measuring the smallest forces. With the K3D35 500 mN variant, forces from 10 µN to 100 µN can be resolved – depending on the measuring amplifier.

The K3D35 3-axis force sensor is equipped with full-bridge strain gauges. The signals from the strain gauge full bridges each correspond to a force component in the x-, y-, and z-directions.
The vector decomposition is therefore achieved mechanically, by three orthogonally arranged spring-joint guides (double cantilever beams), and additionally by the arrangement of the strain gauges in the Wheatstone bridge, so that residual transverse forces and moments are also compensated electrically/circuit-wise. The three double cantilever beams are connected in series in this 3D force sensor.

Calibration of 3-Axis Force Sensors – From Standard (cv) to High Precision (s)

A key characteristic of 3D force sensors is crosstalk: applying a force also triggers a measurement in the two unloaded axes. Thanks to several compensation mechanisms (mechanical and electrical), crosstalk is typically less than 3% of the nominal load. Crosstalk is reproducible and proportional to the amplitude of the applied force. By applying an additional compensation matrix, crosstalk in all axes can be reduced to a maximum of less than 1%.

By default, you receive two factory calibrations, each with two measurement points:

one without a compensation matrix (“cv”) and one with extended matrix compensation (“s”).

For detailed proof of the sensor’s linearity, you can optionally extend the calibration to 4 or 6 measurement points:

• Factory calibration certificate SL/4 (4 measurement points)
• Factory calibration certificate SL/6 (6 measurement points)

This ensures your sensor is optimally calibrated to your application from the very first measurement.