At just 55 mm diameter, the Radian is the ideal subsurface digital seismometer. Available as either a posthole or borehole instrument, the Radian is operational at any angle. To ensure successful, rapid deployment, the Radian system comes with Bluetooth connectivity that shows live waveform data on our smart phone app 'GüVü' for instant installation integrity confidence. The Radian also boasts industry standard formats for data and instrument management.