□ Built-in compass as well as tilt, temperature and humidity sensors □ Extremely robust downhole housing □ Suitable for borehole diameters of 100 mm and larger □ Proprietary iSensor™ interface □ Dynamic Range > 125 dB (0.9 - 15 Hz) > 120 dB (0.9 - 30 Hz) □ Full Scale 20 mm/s (± 10 mm/s) The VE-53-DH is a downhole, triaxial short period seismometer designed for seismic monitoring applications. Based on a state of the art geophone mass-spring system with electronic feedback, the VE-53-DH seismometer is ideally suited for installations with low to moderate noise. The VE-53-DH is housed in an extremely robust downhole housing of austenitic stainless steel. Offering a remarkable stability under temperature fluctuations or against aging, the VE-53-DH also requires no mass locking due to the innovative design of the unit. The VE-53-DH is equipped with electronic offset adjustment features that make its installation very user friendly. This powerful feature allows the users to install the VE-53-DH without mechanical offset adjustment and fine levelling. The advanced iSensor™ interface allows easy deployment using built-in hardware like compass as well as tilt, temperature and humidity sensors. The VE-53-DH seismometer is directly compatible with all GeoSIG solutions. Gain Factor (K) Poles (P) Gain Factor (K) Poles (P) GeoSIG svw'ss made to measure Link to VE-53 sensor response files in the IRIS NRL library

Sensor Element Type: Dynamic Range: Non-linearity: Cross Axis Sensitivity: Bandwidth: Damping: Full Scale Output: Measuring Range (see plot) Power Supply Voltage: Consumption: Overvoltage Protection: Testing Test input: Environment/Housing Housing Type: Housing Size: Weight: Index of Protection: Temperature Range: General Characteristics Configurations: ** H: Horizontal, V: Vertical Sensitivity: 1000 V/m/s differential ( 2 x 500 V/m/s ) Full Scale Range: 20 mm/s (± 10 mm/s) nominal output Over damped geophones > 125 dB (1 - 15 Hz) > 120 dB (1 - 30 Hz) ± 0.05 % of full scale maximum ± 1 % typical...