Model 374A is specifically designed to enable the detection of ultra-low  level,  low  frequency  vibrations  associated  with  very  large structures,  foundations,  and  earth  tremors.  The  sensor  typically possess  exceptional  measurement  resolution  as  the  result  of  a comparatively large size, which furnishes a stronger output signal and a lower noise floor. Both ceramic and quartz sensing elements are utilized in seismic accelerometer designs. The 374A with ceramic sensing element, offers the best low frequency response. Build-in low noise signal conditioning  circuitry  offer  the  greatest  measurement  resolution. For the best measurement clarity, seismic accelerometers should be used with a unity gain, battery powered signal conditioner. The  accelerometer  offer  rugged,  laser  welded,  stainless  steel housing  with  durable  military  style  connectors.  Electrical  case 
isolation, hermetic sealing, RF, EMI, ESD, and overload protection all  ensure  tolerance  against  environmental  influence  and mishandling.  All  variations  provide  reliable  measurements  and long-term stability. 

Features 
•  Ultra Low frequency 
•  Top connector 
•  High sensitivity 
•  Hermetic seal 
•  Case isolated 
•  EMI / RFI shielded 
 
Application 
•Building vibration monitoring 
•Earthquake detection 
•Bridge monitoring 
•Foundation vibration studies 
•Structural testing 

/Products/44.html