NDK has two termination types for the QCM sensors, thru-hole pins and a SMD FR-4 rigid circuit board type. The thru-hole pin types are compatible with other manufacturers’ QCM sensors. If one has another manufacturer’s QCM analyzer, it would be compatible with NDK’s QCM sensors. If the designer is developing instruments, NDK’s SMD FR-4 type QCM sensor is user friendly and robust as it protects the crystal chip from damage during handling. The designer is required to add an oscillation unit to the board on the instrument being developed.