Types 8838 and 8840 are novel complements of shear mode sensors that are designed to respond to two distinctly different forms of induced oscillations. The internal orientation of the quartz elements enables Type 8838 accelerometer to respond to oscillations occurring about the unit’s mounting axis when installed in a non-rotating test application. The element structure of Type 8840 accelerometer is such that the unit will accurately measure the acceleration magnitude of oscillations laterally induced to its mounting base.
Kistler’s shear technology assures high immunity to base strain, thermal transients and transverse accelerations. Notable features include wide frequency response, lightweight titanium construction, hermetic, and ground isolated design. Included within both models are signal processing electronics that convert the charge generated by the mechanical system into a high voltage signal level at a low impedance output. These accelerometers do not use standard voltage mode piezoelectric sensor couplers but are powered by any commercially available (20 to 30 VDC) power supply.