Piezoelectic accelerometer dedicated to building/ground structure vibration measurements Compatible with SVAN 958A and SV 106 Hermetically sealedSV 84 Building / Ground Vibration Accelerometer is a hermeticaly sealed triaxial piezoelectric accelerometer designed to monitor the vibration in harsh industrial environment. Signal ground is isolated from the mounting surface and outer case to prevent ground loops. Annular shear mode design prevents from thermal transient and from spurious signal from high transverse vibrations. Low noise electronic and a temperature compensated design gives the accurate result over the complete temperature range. The glass seal hermetic connector protects the piezoelectric disc and the electronic from harmful environmental influences, significantly increasing their reliability and lifetime.