Table 2.

Quartz crystal parameters.

Resonant Frequency, MHz	5	10
Surface Shape	plano-convex	plano-plano
Quartz Crystal Diameter, mm	14.0
Electrode Diameter, mm	5.0
Resonant Frequency Range, MHz	4.90 to 5.05	9.90 to 10.05
Sensitivity, ng/Hz cm2	17.7	4.2
Mass Resolution, ng	0.35	0.08
Detectability (at Signal/Noise = 3), ng	3.3	1.1
Maximum Mass Load, mg	140	50
Electrode Material	Au, Ag, Pt, Pd or Ti; customized electrodes are also available (vacuum deposited or cathodically sputtered)
Quartz Crystal Holder	Dip type; wetted parts are made of Kel-F® and PTFE with the Au plated electrode contacts; diameter 25 mm; length 165 mm; different holders are necessary for 5 MHz and 10 MHz quartz resonators