In studies of the transport in porous materials it is very important to measure concentration profiles of moisture and ions. Nuclear Magnetic Resonance (NMR) is a powerful technique to measure the time evolution of e.g. moisture profiles with a high spatial resolution. However, many technological porous materials contain large amounts of paramagnetic ions, which complicates the NMR measurements. Therefore the moisture transport is studied using specially developed NMR scanners which  have the possibility to measure quantitative using a Faraday shield. Here a short oveview is give of the instruments and the main characteristics

    4.7T - 200 Mhz
    digital NMR (Spincore based)
    1D,  grad 0.6 T/m max grad
     H, Li, Na, Cl  imaging