Tourmaline Underwater Blast

Series 138 Sensors measure shock wave pressures associated with underwater explosion testing. The sensors are structured with a volumetrically sensitive tourmaline crystal, suspended and sealed in an insulating, oil-filled vinyl tube. They have integral microelectronics. These underwater shock wave sensors provide a clean, non-resonant, high-voltage output through long cables in adverse underwater environments. They can be supplied with a sealed cable of appropriate length, ready to operate. Two physical configurations are available.


  • ICP® underwater blast explosion pressure probes
  • Ranges from 1000 to 50k psi (6894 to 344,740 kPa)
  • Rise time < 1.5 µsec
  • Resonant frequency > 1M Hz

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  • Measurement Range: (for ±5V output)10000 psi
  • Measurement Range: (for ±5V output)68950 kPa
  • Sensitivity: (±15%)0.5 mV/psi
  • Sensitivity: (±15%)0.073 mV/kPa
  • Low Frequency Response: (-5%)1.7 Hz
  • Low Frequency Response: (-5%)1.7 Hz
  • Resonant Frequency: >=1000 kHz
  • Resonant Frequency: >=1000 kHz
  • Electrical Connector: 10-32 Coaxial Jack
  • Electrical Connector: 10-32 Coaxial Jack
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