... sealed body. Stability of characteristics and operational reliability. ParameterUnitSD77(SD77M)SD90Axial sensitivity (± 20 %)pC/g*12080Relative transverse sensitivity%< 5 ... 26)Supplied accessories--stud General view of SD77 Electrical circuit ofSD77 General view of SD77M (Design version without electrical body insulation) ... making out an order. General Purpose Vibration Transducers SD77 (SD77M), SD90