In 2020 NASA announced that Jim Burch of Southwest Research Institute[3] would become the Principal Investigator and that some instrument capabilities might be reduced due to technical and financial limitations.

MASPEX is a next generation spectrometer with significantly improved performance over existing instruments,[6] that was developed over 10 years by the Southwest Research Institute.

Development of the MASPEX was born out of the need to separate and analyze the unexpectedly rich volatile mixtures discovered by the Cassini INMS instrument at Titan and Enceladus.

[5][6] MASPEX can also measure compounds in trace amounts (ppt), including the noble gases argon, krypton, xenon, and their isotopes.

[5][6] The MASPEX can operate in a heavy radiation environment, and can be baked to 300 °C for planetary protection against forward biological contamination in case the probe impacts any potentially habitable moon of Jupiter.