Products

• D3BB-MOB/D6BB-MOB/D9-MOB: mobile digitizer
• D6BB-DIN/D9-DIN: fixed station
• DW-S DW-DIN DW-B: short period seismometers
• Vibrato: home seismological observatory
• SISMOLO-Proto: digital seismometer for development board
• BC-EDU: black carbon sensor

Accessories

• T-DIN : storm detector
• G-DIN : propagates GPS signal over copper cables
• R-DIN : relay control by phone call (typ. modem reset)

DW-S    DW-DIN    DW-B

DW short period seismometers are robust and easy to install sensors based on geophones. The signal of each geophone is digitally processed for equalization (computation of real, in situ, eigen perdiod and damping) and broadening. The signal processing is performed for each geophone, individually, this minimizes the effects of tilt, temperature, and aging. The final signal correponds to a theorethical sensor of 1s or 5s eigen perdiod and 0.707 damping.

The DW family includes :

• DW-S, for surface installation: the IP68 aluminium enclosure with bubble and adustement feet includes the geophones and electronics for signal conditionning and reference signal injection for equalization
• DW-B, for shallow borehole installation: the geophones and electronics for signal conditionning and reference signal injection are included in a PU overmolded enclosure suitable for installation down to 500m
• DW-DIN, for deep borehole installation: the geophones are installed at depth while the electronics for signal conditionning and reference signal injection for equalization remains in surface. The only part of the system exposed hard conditions are the geophones, which are known to tolerate high temperatures several years.
  Note that this setup also allows to process geophones already in place at depth.

Related products: DIN and MOB digitizers.

Download the technical leaflet for more information !