Cetacean Research Technology CR3

Linear Frequency Range (±3dB) [kHz] 0.0004† to 180
Usable Frequency Range (+3/-12dB) [kHz] 0.0001† to 240
Transducer Sensitivity [dB, re 1V/µPa] -207‡
Preamplifier Gain [dB] N/A
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa/√Hz] 54
Power Requirement [Vdc] N/A
RMS Overload Acoustic Pressure [dB, re 1µPa] N/A
Maximum Operating Depth [m] 980
Operating Temperature Range [°C] -40 to 90‡
Capacitance [nF] 6.7
Dimensions [mm] 50 L x 18 dia
Coaxial Cable Length [m] 15 as standard, other lengths available
Cable terminated with male BNC connector (longer cable optional)
Directionality omnidirectional
Battery / Connector box power not required




† Requires a preamplifier with 100MΩ input impedance, such as the Reson VP1000 or Reson VP2000 preamplifiers. If a typical preamplifier with 1MΩ input impedance is used then the low frequency -3dB point will be at 40Hz instead of 0.4Hz and the -20dB point will be at 4Hz instead of 0.4Hz.
‡ CR3 hydrophones are individually spot calibrated at the factory; calibration guaranteed between -5ºC and 30ºC.