The government is conducting market research to identify capable sources for supplying replacement analytical instrumentation for the mobile fuel laboratory known as PQAS-E, used by the 209th Aviation Support Battalion. The equipment must fit within the existing shelter system and computer data acquisition subsystem and support testing of aviation turbine fuels per MIL-STD-3004C. Interested vendors are asked to indicate whether they can provide the entire requirement—including all parts, accessories, and support services—or identify which specific items they can supply. No budget amount, performance location, or submission timeline is provided in this notice. This is a sources sought notice only, used to assess vendor capability.