PCB-EX378B02
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      PCB-EX378B02

      • 1/2 "ICP® Precision Microphone for Free Field Applications
      • Sensitivity 50 mV / Pa
      • Dynamic range> 137 dB
      • Frequency range 3.75 ... 20,000 Hz
      • BNC connector
      • Calibrated as a system
      • With ATEX / IECEx approval
      specifications
      basic dataEnglish unitsSI units 
      Nominal microphone diameter1/2"
      applicationFreifeld
      Sensitivity in the open circuit50 mV / Pa[2]
      Sensitivity in open circuit (± 1.5 dB)-26 dB relative to 1 V / Pa[2]
      Frequency range (± 1 dB)7 … 10.000 Hz
      Frequency range (± 2 dB)3,75 … 20.000 Hz
      Lower cutoff frequency (3dB)1.0 to 3.0 Hz
      inherent noise<15.5 dB (A) based on 20 μPa[1]
      Dynamic range (for harmonic distortion ≤3%)> 137 dB based on 20 μPa[1]
      Operating conditions
      Temperature range (operation)-40 … 176 °F-40 … 80 °C
      Temperature coefficient of sensitivity (+14 to + 158®F (-10 to + 70 ° C))0.005 dB/°F0.009 dB/°C[1][2]
      Influence by static pressure-0,013 dB/kPa[1][2]
      Influence by humidity (0 ... 100%, non-condensing)-0,01 … 0,01 dB/% RH[2]
      Influence by axial vibration (0.1 g, 1 m / s²)63 dB based on 20 μPa[1]
      Technical characteristics
      Polarisationsspannung0 v[3]
      supply voltage20 … 30 VDC
      Constant current supply2 ... 20 mA
      Bias voltage10 … 14 VDC
      output impedance<50 Ω
      Maximum output range±7 Vpk
      Physical properties
      housing materialStainless alloy
      pressure equalizationbehind[4]
      Electrical connectionBNC-Stecker
      Mounting thread (protective cap)0.5 - 60 US
      Size - diameter (with protective cap)0,52 in13,2 mm
      Size - diameter (without cap)0,50 in12,7 mm
      Size - height (with protective cap)4,02 in102,1 mm
      Size - height (without cap)3,99 in101,2 mm
      Mass1,87 oz53 grams[1]

      Hints
      [1]typically,
      [2]Based on 250 Hz
      [3]prepolarised
      [4]Bleed through preamplifier.

      included supply
      ACS-63Calibrate precision condenser microphones and preamplifiers together(1)
      PCB-EX378B02

      Specific References

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      EX378B02_Drawing.pdf

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      EX378B02_Manual.pdf

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      EX378B02_Specs.pdf

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