Gecko SMA-HR is a modern technlogies of Accelerograph that combined recorder and acceleration sensor that can be fixed to a structure with a single central bolt. The low-noise SMA-HR uses an integrated optical feedback accelerometer providing an all-in-one package that continuously records data in a ring buffer so that when the earthquake eventually strikes you know you’ll have captured all of the data. Such high sensitivity enables the monitoring of the natural frequency and modal response of a structure, critical for improving building safety.