Seismic Recorders


PRA-103 Peak Recording Accelerograph

Click photo for PRA-103 brochure

Model PRA-103 detects and records peak amplitudes of low-frequency accelerations caused by events such as earthquakes, strong winds, blasting, and pile driving. It permanently records peak acceleration values for three orthogonal axes on magnetic tapes. Applications include back-up monitoring for conventional accelerograph systems in nuclear power plants, drilling rigs, dams, buildings, and offshore structures. Model PRA-103’s are also used to record peak accelerations in locations without power or with a maximum temperature between 70 and 150 degrees C. They are also used to monitor shipping-induced accelerations during transportation of delicate items. Models are available with a full-scale range of +/- 0.5, 1, 2, or 5 g.