Q-Sense E1/E4 use QCM芯片

                    Frequency：      4.95 MHz +/- 50 kHz
                    Cut：                   AT
                    Electrode layer： 40 nm - 1 μm

                    Size Diameter:     14 mm,                    

                    Thickness:            0.3 mm
                    Finish:                   Optically polished,

                    surface roughness of electrode： less than 3 nm (RMS)

                    Basic elements: Aluminum, Cobolt, Chromium, Copper, Gold, Iron, Iridium,

                    Magnesium, Molybdenum, Nickel, Palladium, Platina, Silica, Silver, Tantalum,

                    Titanium, Tungsten, Zirconium
                    Oxides: Silicon dioxide, rough Silicon dioxide, Aluminium oxide, Iron oxides,

                     Zirconium oxide, Cerium oxide, Zinc oxide, Silver oxide, Magnesium oxide,

                     Titanium dioxide, Indium-tin oxide