STF series
Fe-Cr-Al alloy gages are designed for the use in the widest operating temperature range. These bondable high-temperature wire strain gages are dedicated for measurements of deformations in the details of machinery and equipment, including jet engines, under static and dynamic loads up to +1150°C temperature range. Sensitive grid of the gage is made of 20…30 um diameter iron-chromium-aluminum alloy wire. Sensitive grid is fixed on the temporary backing, possible in two variants: filter paper or fiberglass-reinforced PTFE. Lead wires are made of ribbon or flat wire with 0.07…0.15 mm diameter. Material of the lead wires correlates with the sensitive grid material and is also iron-chromium-aluminum based.
Characteristics
| Maximum operating temperature: | 1150°C |
| Description: | Wire high temperature strain gages, made of Fe-Cr-Al alloy. |
| Features: | High resistivity and excellent oxidation resistance. |
| Uses: | Recommended for high temperature measurements for engine and turbine tests |
| Strain Type: | Static and dynamic |
| Gage Resistance (nominal): | 120 Ohms |
| Length of sensitive grid (mm): | 1.7-5.5 |
| Lead Wire/ Length/ Type: | Fe-Cr-Al /45 mm / ribbon or flat |
| Backing: | Filter paper or fiberglass-reinforced PTFE |
Configuration
| Strain gage configuration | Designation | Nominal resistance, Ohm | Nominal base length, mm | Sensitive grid dimensions, B x W, mm |
|---|---|---|---|---|
 | STF120-1.7AA-A1100-F015-45 | 120±3 | 1.7 | 1.7 х 2.2 |
| STF120-3AA-A1100-F015-45 | 120±3 | 3.0 | 3.1 х 1.6 | |
| STF120-5AA-A1100-F015-45 | 120±3 | 5.0 | 5.5 х 2.0 |
