STN series
Key features
STN strain gages are the most common type of bondable high-temperature wire strain gages for static and dynamic loads in the temperature range up to +900°C. Sensitive grid of the gage is made of 15…30 um diameter nickel-chromium alloy wire. Sensitive grid is fixed on the fiberglass-reinforced PTFE temporary backing. Lead wires are made of ribbon or round wire with 0.07…0.15 mm diameter. Material of the lead wires correlates with the sensitive grid material and also nickel-chromium based.
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Characteristics
| Nominal parameters | Value |
| Sensitive grid material | Nickel-chromium |
| Possible number of sensitive elements | 1, 2 or 3 |
| Base length, mm | 1.7–5.5 (.067"-.0217") |
| Gage width, mm | 1.6–2.6 (.063"-.102") |
| Resistance, Ohm | 120–350 |
| Resistance deviation in batch, not more than | ±1% or ±3% |
| Lead wire material | Nickel-chromium |
| Lead wire diameter, mm | 0.07–0.15 (.0028"-.0059") |
| Lead wire type | Ribbon or round |
| Lead wire length, mm | 50–300 (1.97"-11.81") |
| Temporary carrier | Fiberglass-reinforced PTFE |
| Fatigue life at ±650 ppm at 20°C, cycles | 106 |
| Bonding Methods | Ceramic Cement or Alumina flame spray |
| Max. working temperature | 900°C (+1652°F) |
| Type of measurements | Static and dynamic |
