Solid particles in the sample gas, especially ultrafine particles, are reliably separated by M&C universal filters with filter elements of high fineness and great in-depth efficiency. Thanks to the modular design of the M&C universal filters, they can be optimally adapted to the process conditions. The M&C liquid particle filters are suitable for separating ultra-fine liquid particles (aerosols). They are used to protect the sensors in the analyzer from droplets caused by aerosols.