B3.1 - High-Sensitive Chromium Strain Gauges on Steel Surfaces
- Event
- SMSI 2025
2025-05-06 - 2025-05-08
Nürnberg - Band
- Lectures
- Chapter
- B3 - Pressure Sensors and their Applications
- Author(s)
- R. Ottermann, T. Steppeler, M. Wurz - Leibniz University Hannover, Garbsen (Germany)
- Pages
- 89 - 90
- DOI
- 10.5162/SMSI2025/B3.1
- ISBN
- 978-3-910600-06-5
- Price
- free
Abstract
This article presents the photolithographic manufacturing and characterization of high-sensitive chro-mium-based strain gauges. They are produced polymer-free on stainless-steel tensile specimens and show high k-factors (strain sensitivity) of 11.0 ± 0.1. Their temperature coefficient (temperature sensitiv-ity) of 591 ± 23 ppm/°C is comparably high which is why a full-bridge arrangement in cooperation with a temperature sensor next to it is used. This leads to a sensor system that can be used for harsh environ-ment pressure measurements with a sensitivity of 1.71 μV/V/μm/m.