These press force sensors are based on the piezoelectric measuring principle. The force acting on the crystal element produces a proportional electric charge at the signal output. A measuring amplifier connected downstream to the sensor for example ICAM Type 5073A... typically converts this charge into a process signal which can be evaluated, for example 0 ... 10 V. The particularly square shape of the sensor body and the force introduction at both ends via axial threaded bores bring advantages in special mounting situations. Tensile forces up to 10 % of the compression force range are measured. These ranges are not calibrated. However, they are often used for the detection of tool withdrawal forces, for example after press-fitting processes.