PCB-EX378B02

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)

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