A well logging instrument including a plurality of detectors having different precisions and accuracies, the more precise detectors generally having lower accuracies. A first channel is provided on a first side of the body and an extension extends from a second, opposing side of the body. The emulation circuit can apply analog signal processing andor mixed signal processing to the signal. Alternatively, the first converter is configured to provide power through a first series inductor and the second converter is configured to provide power to the output node through a second series inductor. In handling the silicon wafer, generation of contact scratches is suppressed as little as possible, and a fracture which is caused by development of the crack initiating from easily generated contact scratches can be prevented in the silicon wafer, particularly in the silicon wafer having {110} plane as its principal surface. The expansion piston and the compression piston are disposed along a common axis.