The compact basic flue gas probe is equipped with a dirt filter, which protects the measuring instrument and its sensors. Flue gas path and temperature channel can conveniently be connected to the measuring instrument via a practical bayonet lock. The thermocouple NiCr-Ni, which is integrated in the 180 mm long probe shaft, enables temperature measurement up to 500 °C.Compact basic flue gas probe 180 mm including dirt filter, cone for attachment, thermocouple NiCr-Ni Tmax 500 °C and hose 1.5 m.