temperature and heat flux measurements

High frequency measurement for heat flux determination adaptable to any surface shapes.
Invented at the University of Aachen for measurement of high frequency surface temperature changes during hypersonic wind tunnel experiments with the European space shuttle Hermes.
Convective heat flux is deduced from the signal of the surface temperature.
The probe is to be viewed as a half infinite body. The sensor measures the temperature changes on the surface of the model.
Heat flux can be calculated with knowledge of the wall material.
The probe is small enough to be mounted on a wing tip and can be grinded to adapt to the shape of the surface.
The metallic dust gives the contact between the two metals. Alternatively the conjunction can be reached by a vacuum disposition of a metal coating, but with the disadvantage of a fixed geometry.
Fast response time of only µs.
Can be used for all cases where fast surface temperature measurements are required:
- in engines
- in jet turbine engines etc. without disturbance of the stream.
Recommended for harsh environmental conditions or high heat fluxes.

Coaxial thermocouple of TIS type with highest sensitivity - thermocouple with increased sensitivity.
Superior sensitivity of about 180 µV/K compared to standard thermocouples - threefold higher sensitivity than for the typical type E probe.
The thermocouple is a standard setup consisting of an outer sheath of 4 mm diameter and 150 mm length with a ceramic plug at its end.
Other plugs are possible if required.
The sensitive area is at the tip of the bar. The high sensitivity of this thermal element results in a superior signal-to-noise ratio which reduces the costs for amplifiers or to measure precisely small temperature changes in a wide range of temperatures.
The maximum working temperature of the thermocouple amounts to 1000 °C.

Measurement of highly transient temperatures.
Consist on a ceramic substrate of zirconium oxide on which a thin film of nickel is deposited.
Magnitude more sensitive than the offered thermocouples.
Temperature changes of only 0.1 K can be measured.
Measurement of static to high transient surface temperatures with response times in the range of microseconds.
The Thin Film Thermometer is recommended for measurements in clean conditions and moderate heat fluxes.