Sensors::Downtime

The MTTF (Mean Time To Failure) cannot be determined exactly for sensors with strain gauges.

The fatigue strength depends on many factors:

- from the component itself (design, material...etc.)

- environment (humidity, temperature...etc.)

- operating conditions (load amplitude, number of load cases, pulsating load, changing load, ...)

We design most of our sensors with an output signal of 1 mV/V. This corresponds to a strain of 500 µm/m, or a mechanical tension on the strain gauge of 36.5 N/mm² for aluminum, or 105 N/mm². This means that the sensors and strain gauges are clearly dimensioned in the fatigue strength range.

Influence of the load

Similar to metallic materials, there is an influence of the amplitude and the type of load, e.g. pulsating or alternating load.

Up to an elongation of 1000µm/m, more than 10E6 load cycles are achieved, with 500µm/m, fatigue strength is usually achieved.

Influence of processing

The decisive factor for achieving fatigue strength is faultless processing with soldering terminals and a strain relief loop with AWG36...AWG30 stranded wire and covering with appropriate covering materials.

Thanks to a secure bonding, wiring and potting process, our sensors have a service life of 20 years or more.