KD/STZ Reference Force Transducers KD/STZ Reference Force Transducers | HBM

KD/STZ: Reference Force Transducers for the Verification of Testing Machines

KD and STZ force transducers have been specifically designed for the verification of material testing machines in compliance with ISO 7500-1. While the KD force transducer is suitable for compressive forces, the STZ measures tensile forces.

Both sensors can be used for referencing the testing machine’s measuring system, and therefore comply with the requirements of ISO376, class 0.5 in the measurement range between 20% and 100% of their capacity.

Both special force sensors are also used to test machine frames while subjected to a load. With four galvanically isolated strain gauge full bridges offset by 90° around the circumference of the measuring body, the transducers can determine whether the testing machine’s force application parts and the machine frame guarantee the perfect axial stressing of the test specimen. To achieve this, the force transducer is rotated several times in the machine.

Proven quality

  • Tried and tested monolithic design
  • Four galvanically isolated full bridges, enabling the reliable recognition of the force signal and potential machine frame misalignments

The sensor design guarantees reliable and traceable results.

Standards-compliant and complete

  • Meets the requirements of class 0.5 according to ISO376
  • Facilitates tests in compliance with EN7500
  • Matching bridge amplifiers and calibration services are also available from HBM

Years of experience in reference measurement range, along with matching electronics, results in the most cost-effective, long-term solution for your tests.

Matching precision amplifier

DMP41 digital precision measuring instrument                       


Connection cable 1-KAB159-5


Technical documentation and additional product information

Title / DescriptionLanguage
Data Sheets
KD, STZ - Data Sheet English
KD, STZ - Datenblatt German
KD, STZ - Prospetto dati Italian
Mounting Instructions
KD, STZ - Mounting instructions / Montageanleitung English, German
Declaration of Conformity
1-KAB, K-KAB (cable) - EU Declaration of Conformity Multilanguage