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The Cetacean Research Technology C304 & C304XR

The Cetacean Research C304xx is a preamplified, flat sensor hydrophone designed for the detection of low frequency, audible, and ultrasonic sounds. It has the wider band available today.
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The Cetacean Research C304 Hydrophone has a directional receive pattern with very wide frequency response for monitoring ultrasonic signals not detectable by competing brands.
The C304XR has a usable frequency response up to 2MHz.

The connector is an integral part of the hydrophone. Hydrophones are not individually calibrated but calibrated frequency response measurements can be performed on request.
Specifications for the C304
Linear Frequency Range (±3dB) [kHz]: 0.012 to 250+
Usable Frequency Range (+3/-20dB) [kHz]: 0.005 to 250+
Transducer Sensitivity* [dB, re 1V/µPa]: -201
Preamplifier Gain [db]: 33
Effective Sensitivity* [dB, re 1V/µPa]: -168
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa]: ~ 63
Power Requirement [Vdc]: 5 to 32
RMS Overload Acoustic Pressure [dB, re 1µPa]: 172 to 189
Maximum Operating Depth ** [m]: 460
Operating Temperature Range [ºC]: -40 to 60
Output Impedance [ohm]: 10
Dimensions [mm]: 83 L x 32 W x (25 to 6)T
Integral Connector: Subconn MCBH3MSS

Specifications for the C304XR
Linear Frequency Range (±3dB) [kHz]: 0.012 to 1000+
Usable Frequency Range (+3/-20dB) [kHz]: 0.005 to 2000+
Transducer Sensitivity* [dB, re 1V/µPa]: -201
Preamplifier Gain [db]: 20
Effective Sensitivity* [dB, re 1V/µPa]: -181
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa]: ~ 63
Power Requirement [Vdc]: 5 to 32
RMS Overload Acoustic Pressure [dB, re 1µPa]: 185 to 202
Maximum Operating Depth ** [m]: 460
Operating Temperature Range [ºC]: -40 to 60
Output Impedance [ohm]: 10
Dimensions [mm]: 83 L x 32 W x (25 to 6)T
Integral Connector: Subconn MCBH3MSS
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Frequency response graph
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Beam pattern
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new option for all models: Hydrophone protection cage
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Battery / Connector box
Battery boxes are rated NEMA-4X water resistant. Standard signal connection for the Cetacean Research C304xx hydrophone is through a watertight female BNC connector.
The hydrophones are powered by a single 9V battery (not included).
Signal Output: Female BNC connector
Battery Life [hours]: > 20
Box Dimensions [mm]: 98 long x 64 wide x 40 high
notes

*  Transducer Sensitivity + Preamplifier Gain = Effective Sensitivity.
**  1,000 meter versions are available. Append "-1k" to the model number to order a hydrophone with a depth rating >1,000 meters.

Shielded Cable Length [m] mating connector molded to 15, 30, or 50 [m] shielded cable, other lengths available on a custom order basis. Cable includes Integral Connector rated to a depth of 7,000 meters.

Directionality: omnidirectional below 10kHz; very directional at high frequencies (e.g., ~15º solid angle at 200 kHz, -3dB); directionality pattern is a dipole, directionality focused in a plane.
Options
  • removable in-line high-pass filter
  • external power supply support
  • HYDROPHONE PROTECTION CAGE (see on the left)

Shielded Cable Length [m]: mating connector molded to 15, 30, or 50 [m] shielded cable as standard, different lengths available on order.

Cable includes Integral Connector rated to a depth of 7,000 meters.