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Thin Film Thermometer MTFT
Measuring Highly Transient Temperatures
Application
There are multiple applications for this type of sensor. The gauges are suitable for measuring constant temperature over time, but transient measurements e.g. testing wind tunnel models give their superior field of application, the change of cylinder wall temperature in a piston engine or for calculations of heat flux in a re-entry phase on a rocket model in a hypersonic wind tunnel.
In the case of measuring the re-entry simulation on the space shuttle Hermes, thin film thermometers were used on the surface of the delta wings, where smaller temperature changes were expected. Our thermocouples were used in the nose of the wing due to the very high heat flux, the higher mechanical stability and the adaptive sensor head to the curved surface.
Technical Data
| Thin film material: | Nickel |
| Substrate: | Zirconium Oxide |
Smallest measurable temp. change: | 0.1 K |
| Responds time: | < 10 µs |
| Resistance: | 25 to 50 Ohm |
| Temperature Range: | < 70°C for continuous operation |
| Sensitivity: | α = 0.002 to 0.0025/K |
| √p c k | About 0.35 J/(K cm² √s ) |
| Power supply: | Constant current 7 – 10 mAh |
| Diameter: | 2.3 mm ± 0.1 mm |
| Length: | 3.3 mm |
| Calibration: | Delivered calibrated by University Aachen |
| Periphery: | The thin film thermometer needs a constant current source and an amplifier. The type of periphery depends on the application. |
| Ordering information | |
| Article-No. 100-002-1: | Thin Film Thermometer MTFT with soldered platinum wires |
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