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CR1 hydrophone product photos    for maximum enlargement, click on thumbnail; --- for medium-sized enlargement, scroll down

The Cetacean Research™ model CR1 hydrophone is an excellent multi-purpose hydrophone. Various uses are detection & recording of very loud signals, listening & recording of quieter sounds like cetaceans, whale watching operations, and terrestrial applications.

The hydrophone comes with an extra tough polyurethane-jacketed coaxial cable. The cables can be terminated with either BNC or mono phone plug connectors. All CR1 hydrophones are individually spot calibrated at the factory.

Linear Frequency Range (±3dB) [kHz]		0.0002† to 48
Useable Frequency Range (+3/-12dB) [kHz]		0.00005† to 68
Transducer Sensitivity [dB, re 1V/µPa]		-198
Preamplifier Gain [dB]		N/A
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa/√Hz]		38 (< Sea State Zero)
Power Requirement [Vdc]		N/A
RMS Overload Acoustic Pressure [dB, re 1µPa]		N/A
Maximum Operating Depth [m]		100
Operating Temperature Range [ºC]		-25 to 60‡
Capacitance [nF]		10
Dimensions [mm]		73 L x 32 dia
Coaxial Cable Length [m]		15 Cable terminated with male BNC connector (longer cable optional)
Directionality		omnidirectional below 10kHz
Battery / Connector box		power not required
† Requires a preamplifier with 100M input impedance, such as the Reson VP1000 (PDF) or Reson VP2000 (PDF) preamplifiers. If a preamplifier with 1M input impedance is used, such as thePC200 (PDF), then the low frequency -3dB point will be at 16Hz instead of 0.2Hz and the -20dB point will be at 2Hz instead of 0.02Hz. ‡CR1 hydrophones are individually spot calibrated at the factory; calibration guaranteed between -5ºC and 30ºC.

Options extra length ruggedized cable custom orders not listed above hydrophone may be used with either the optional ART USB Dual Pre,  Reson VP1000 (PDF), or Reson VP2000 (PDF) preamplifiers.