DYTRAN hat das Ausgasen im Griff!
Sensors that are used in Space applications are subject to many parameters that limit their use. Depending on where they are deployed, they must be very small, very light, low outgassing, and/or suited for use in extreme temperatures - both close to absolute zero and – the other extreme – for extremely high temperatures near the engine.
One of the factors to be considered for space environments is that sensors used in space are used under high vacuum conditions and must therefore be low outgassing. This could also be necessary for ground vibration tests in labs since the sensors often remain in the satellites after testing, being to cumbersome to remove. Since these sensors remain within the satellite when it is launched, they may not contaminate the high vacuum requirements - even if they are not used for measurements in flight.
The cables used are also subject to such demanding requirements. Teflon, when subjected to load experiences a continued deformation ("cold-flow") so that Teflon must be wrapped with a thin foil and subsequently heat-sealed. Copper wires are often silver-coated to improve conductibility. However improper coating techniques can result in "red plague" a galvanic corrosion causing flaking of the silver-coating due to copper deposits on silver, thereby reducing the conductibility.
Extreme temperatures (high AND low) require matching the coefficients of thermal expansion of internal components of the used components, and an optimal choice of piezo-ceramics and crystals which do not crack if exposed to large temperature gradients. This together with other considerations such as size can minimize or eliminate spurious signals such as often reported 'spiking' phenomena.
The patented 'Silver Window' for high temperature seals sensors at room temperature and allows the sensors to 'breathe oxygen' at high temperatures.
30 years of engineering experience has resulted in the world's smallest, lightest, 'coolest' and 'hottest' sensors with the 'cleanest' signals.
These demanding challenges require a high degree of experience with the interaction of components. Some of these developments were done within record times, being pressed for time by schedules dictated by rocket or satellite launches