The filter probe adaption for the GPro™ 500 is a nonpurged probe with a filter covering to prevent measurement interference in high dust or high condensate containing gas streams. It provides accurate and stable measurements in harsh, environments. The filter probe-type adaption for the GPro 500 tunable diode laser gas analyzer enables in situ gas measurement in dusty, high-temperature or high-speed gas streams. It can be connected to the full range of METTLER TOLEDO GPro 500 gas analyzers for measurement.