In some special cases the standard sensors cannot be used because of package or other reasons. We develop for these complicated issues specific sensor solutions or measuring methods.
For detection of torsional or linear vibrations we use very often the high end magnetoresitive sensor bodies (AMR, GMR or TMR). We are in close contact to a major supplier and we are up to date about the newest sensor soultions.
Also, this kind of sensors is used at the fired valve lift measurement. The precision of the measuring method is so high, that the oil canning effect of the valve (ca. 20 µm deformation of the valve head during combustion) is also visible.