*NOTE - Some products in the tabs below are either currently inactive or obsolete. They are displayed as examples for use in various programs and can be modified. Please contact us for additional information.

INTRODUCTION

PCB® has extensive experience with underwater vibration and unsteady, rapid fluctuating, pressure measurements. Our experience with underwater testing can be used in specific applications for measuring and identifying:

  • Vibration
  • Cavitation caused by unsteady pressure
  • Dynamic pressure from waves

Highlights:

  • Waterproof, pressure tested cables can be over-molded directly to the sensor
  • ICP® voltage output or constant voltage line driver (CVLD) current output operates through long cables with low noise
  • Electrical case isolation for the lowest possible noise
  • Corrosion resistant construction

RAPIDLY FLUCTUATING PRESSURE, UNSTEADY FLOW,
CAVITATION & WAVE SLAP

Unsteady pressures must be measured and identified, including water flow and cavitation.

High Resolution ICP® Pressure Probe

Model S112A22

  • 100 mV/psi, 50 psi
  • Stainless steel

High Frequency CVLD Pressure Sensor

Model 113M231

  • 50 psi, 100 uA/psi
  • Emralon coated
  • Integral waterproof cable
  • Acceleration compensated
  • Ground isolated

Subminiature ICP® Pressure Sensor

Model 105C

  • 100 psi, 50 mV/psi
  • Integral twisted pair cable
  • SS wetted parts
  • Solid end cap diaphragm well suited for cavitation measurement

4-Conductor, Shielded, FEP Cable

Model 034Wxx

  • Used with triaxial ICP® accelerometers
  • 4-conductor, shielded, FEP jacket
  • IP68 Rated 1/4-28, 4-socket plug to 3 BNC plugs

4-Conductor, Shielded, Polyurethane Cable

Model 078Wxx

  • Used with triaxial ICP® accelerometers
  • 4-conductor, shielded, flexible polyurethane jacket
  • IP68 Rated 1/4-28, 4-socket plug to 3 BNC plugs

VIBRATION

Shear mode accelerometers isolate the sensing crystals from the base and housing, lowering thermal transients and signal noise resulting from base bending effects. This is a very important feature when attaching them to relatively thin walled vessel hull models during wave slap applications.

ICP® Underwater Accelerometer

Model 352M221

  • 10 mV/g, ±500 g
  • 2nd order LP filter
  • Frequency response from 1 Hz to 10 kHz
  • Integral waterproof cable

Miniature Ring-style, Ceramic Shear CVLD Accelerometer

Model 355M87A

  • 100 μA/g, ±50 g
  • Frequency response from 7 Hz to 9 kHz
  • Integral waterproof cable
  • Case isolated

Triaxial, Miniature, High Sensitivity ICP® Accelerometer

Model 354M85

  • 100 mV/g, ±50 g range
  • Frequency response 1 Hz to 8 kHz
  • Hermetic housing

Miniature Ring-style, Ceramic Shear ICP® Accelerometer

Model 355M73

  • 100 mV/g, ±50 g range
  • Frequency response 7 Hz to 10 kHz
  • Integral waterproof cable
  • Case isolated

Teardrop ICP® Accelerometer With Flexible, Integral Cable

Model 352A74

  • 100 mV/g, ±50 g range
  • Frequency response 1 Hz to 8 kHz
  • Hermetic housing

Precision Quartz Industrial ICP® Accelerometer

Model 624B11

  • 100 mV/g, ±50 g range
  • Frequency response 0.8 Hz to 10 kHz
  • Integral waterproof cable
  • Case isolated

The Swiveler® Low Cost Industrial ICP® Accelerometer

Model 607A11

  • 100 mV/g, ±50 g range
  • Frequency response from 0.5 Hz to 10 kHz
  • Integral waterproof cable
  • Patented 360º cable orientation
  • Case isolated

Ring-Style Seismic Shear CVLD Accelerometer

Model 631M21

  • 1000 μA/g, ±2.5 g range
  • Frequency response from 1 Hz to 4 kHz
  • Integral waterproof cable
  • Case isolated

FORCE

ICP® Quartz Force Rings

Model 202M44

  • ± 100 lbs. (0.4 kN)
  • Measures dynamic excitation or reaction forces
  • Integral waterproof cable

Modally Tuned® Impulse Hammer

Model 086M99

  • 500 lbf, 10 mV/lbf
  • Hammer mass 0.34 lbs.
  • Integral waterproof cable

UNDERWATER BLAST

Piezoelectric pressure sensors also measure shock waves and bubble energy associated with underwater explosion testing. Sensors structured with volumetrically sensitive, omnidirectional tourmaline crystal and ICP® microelectronics provide a high frequency, low impedance output in underwater test environments. Waterproof cables of customer requested lengths are factory installed.

Tourmaline ICP® Underwater Blast Sensor

Series 138A

  • ICP® underwater blast pressure probes
  • Ranges from 1000 to 50k psi (6894 to 344,740 kPa)
  • Rise time 1.5 μ sec
  • Resonant frequency ≥ 1 MHz