VE-53 / VE 52 / VE 51 Short Period Seismometer Features  Sensitivity 1000 V/m/s differential  Bandwidth 1.1 s (0.9 Hz) to 89 Hz 8.0 s (0.125 Hz) to 160 Hz (BB version)  Dynamic Range > 125 dB (0.9 - 15 Hz) > 120 dB (0.9 - 30 Hz)  Robust mechanical design  Excellent temperature and aging stability  Low power consumption  Easy testing, low maintenance Outline The VE-5x is a triaxial short period seismometer designed The VE-5x is housed in a sealed cast aluminium housing. The housing incorporates a single bolt mounting system for seismic monitoring applications. with three levelling screws. The VE-5x seismometer is based on a state of the art geophone mass-spring system with electronic feedback. It The broaderband version, VE-53-BB, is suitable for is ideally suited for installation in vaults with low to moderate applications involving an extended frequency range. noise. Stainless steel or Ex-proof packaging optionsb are also VE-5x offers a remarkable stability under temperature available. fluctuations or against aging. In addition due to the The VE-5x seismometer is directly compatible with all innovative design of the unit no mass locking is required. GeoSIG solutions. Nominal frequency response of VE-53 Nominal frequency response of VE-53-BB Link to VE-53 sensor response files in the IRIS NRL lib

General Characteristics Configurations: Power Supply Voltage: Consumption: Overvoltage Protection: Testing Test input: 9 to 18 VDC 59 mA typical, 88 mA max. @15 VDC All pins are protected Activated by applying a 12 VDC voltage to generate an output of a pulse with an amplitude of 50% of the full scale Full Scale Range: 20 mm/s (± 10 mm/s) nominal output Environment/Housing Housing Type: Sensor Element Type: Dynamic Range: Linearity: Cross Axis Sensitivity: Bandwidth: Damping: Full Scale Output: Measuring Range (see plot): Over damped geophones > 125 dB (1 - 15 Hz) > 120 dB (1 - 30 Hz) ± 0.05...