Stacks Image 85

The Cetacean Research Technology C55RS

The Cetacean Research C55 and C55RS models are preamplified, cylindrical hydrophones designed for the detection of infrasonic, audible, and ultrasonic sounds.
Stacks Image 86
The Cetacean Research C55RS models are preamplified, cylindrical hydrophones designed for the detection of infrasonic, audible, and ultrasonic sounds. In addition to typical underwater use, these hydrophones can also be used for the detection of airborne and subterranean sounds and vibrations. 
The C55 and C55RS hydrophones include an integral connector and are encapsulated in a very rugged polyurethane material. 

The hydrophones are not individually calibrated but calibrated frequency response measurements can be performed on request.
Specifications
Linear Frequency Range (±3dB) [kHz]: 0.016 to 50 & 122 to 250+
Usable Frequency Range (+3/-20dB) [kHz]: 0.006 to 82 & 92 to 250+
Transducer Sensitivity* [dB, re 1V/µPa]: -200
Preamplifier Gain [dB]: 20
Effective Sensitivity* [dB, re 1V/µPa]: -180
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa]: 58
Power Requirement [Vdc]: 5 to 32
RMS Overload Acoustic Pressure [dB, re 1µPa]: 184 to 201
Maximum Operating Depth ** [m]: 460
Operating Temperature Range [ºC]: -40 to 60
Output Impedance [ohm]: 2.5
Dimensions [mm]: 119 L x (25 to 16) dia.
Integral Connector ***: Subconn MCBH3MSS
Stacks Image 87
Frequency response graph
Stacks Image 88
new option for all models: Hydrophone protection cage
Stacks Image 89
Battery / Connector box
Battery boxes are rated NEMA-4X water resistant. Standard signal connection for the Cetacean Research C55RS 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
Directionality
• omnidirectional below 10kHz;
• very directional at high frequencies (e.g., ~15º solid angle at 200 kHz, -3dB);
• directionality focused in a plane.
notes

The C55RS hydrophone is a direct replacement for the C54XR.

*  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.

*** Connectors are rated to a depth of 7,000 meters.
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.