The 1073822 replacement gas cell O-ring, is a 2-030 Kalrez O-ring designed to seal the back (objective) mirror of MultiGas 203X/603x Fourier Transform Infrared (FTIR) gas analyzers having a 70mL gas cell volume to the sample cell body. This perfluoroelastomer has been selected for its exceptional chemical resistance to a wide range of aggressive gases and its ability to withstand high operating temperatures (up to 191°C) in hot, wet sample streams. As part of routine gas cell maintenance, oring 1073822 should be replaced whenever the objective mirror is removed for cleaning. Objective mirror sold separately. Quantity of one 1073822 o-ring included.