Ring-Forcesensor "SM70": ETH-messtechnik gmbh


Force-Ring Transducer "SM70"

For testing clamping forces

4 Measurement ranges from 0 - 20 kN to 0 - 1200 kN


Key Features

  • available from 6 mm to 42 mm hole diameter
  • measuring ranges of 0 - 20 kN (M6) to 0 - 1200 kN (M48)
  • entirely of stainless steel
  • degree of protection IP 66
  • short measuring distance
  • very high natural frequency (KHz)
  • ideal for the determination of screw preload force
  • extremely flat and robust sensor design
  • hardened washers included
  • very good reproducibility in a fixed position (<1%)


The series force transducers SM70 was developed specifically for the measurement of clamping forces. The low measuring range of max. 0.05 mm and a natural frequency which is in the KHz range, guarantee optimum results even in highly dynamic tasks. Typical applications include the simple determination of Schraubenvorspannungen where the load cell is used as a "measuring washer". The very good reproducibility lies less than one percent of the rated load. The sensor is available in pressure ranges from 20 to 1200 kN. Hardened washers are included in the package for easy and quick installation. The extremely flat and robust design is completely made of stainless steel (protection IP 66).


Rated Capacity (RC)kN0-20, 0-40, 0-60, 0-100, 0-200, 0-300, 0-400, 0-410, 0-600, 0-720, 0-100, 0-1200
Operating Modes Clamping force measurement
Sensitivity RangemV/V1,7 ... 2,3
Operating Temperature Range°C-10 to+70
IP Rating IP66
More Information see data sheet