Many interesting structural and thermal events occur in materials that are housed within a surrounding pressure vessel.
In order to measure the environment during these events and explore their causes instrumentation must be installed on or
in the material. Transducers can be selected that are small enough to be embedded within the test material but these
instruments must interface with an external system in order to apply excitation voltages and output the desired data. The
methods for installing the instrumentation and creating an interface are complicated when the material is located in a
case or housing containing high pressures and hot gases. Installation techniques for overcoming some of these
difficulties were developed while testing a series of small-scale solid propellant and hybrid rocket motors at Marshall
Space Flight Center. These techniques have potential applications in other test articles where data are acquired from
materials that require containment due to the severe environment encountered during the test process. This severe
environment could include high pressure, hot gases, or ionized atmospheres. The development of these techniques,
problems encountered, and the lessons learned from the ongoing testing process are summarized.