V370 38KHz resonance vibration sensor for stress wave:
Model 370A is an industrial IEPE accelerometer for measuring high frequency  stress  wave.  370A  features  an  annular  shear  ceramic crystal  which  exhibits  excellent  output  stability  over  time.  The accelerometer incorporates an internal circuit with in a two-wire IEPE system which transmits its low impedance voltage output through the same cable that supplies the constant current power. Signal ground is  internal  shielded  and  isolated  from  the  outer  case  of  the  unit. Polarity inversion protection for the amplify circuit is inherent in the circuit  design.  The  welded  stainless-steel construction  provides  a hermetic  housing.  The  standard  MIL-C-5015  glass  insulated connector provides long-term stability over the operating temperature 
range. 370A has  ¼-28 threaded holes for stud mounting on the test object.  370A  especially  support  the  high  frequency response(>10KHz).  The  sensor  picks  up  the  machine  stress  wave signal  generated  by  premature  wear  and  scale  it  by  sensor resonance,  which  is  ideal  for  gearbox  and  bearing  detection.

Features 
• High frequency response 
• Rugged design 
• High sensitivity 
• Hermetic seal 
• Case isolated 
• ESD protection 
• Reverse wiring protection 
• EMI / RFI shielded 
• High Q diagnostic 
 
Application 
•Machine monitoring 
•System acoustics 
•Defect analysis 
•Rotating machine 
•Abrasion testing