Cetacean Research Technology CR1A
This non-preamplified hydrophone is ideal for the detection and recording of very loud signals, such as those from pile driving, air guns, or underwater demolition operations.
All CR1A hydrophones are individually spot calibrated at the factory.
Linear Frequency Range (±3dB) [kHz]: 0.00016 to 48
Useable Frequency Range (+3/-20dB) [kHz]: 0.00005 to 68
(see note †)
Sensitivity [dB, re 1V/µPa]: -199
Preamplifier Gain [dB]: N/A
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa]: 38dB
Power Requirement [Vdc]: N/A
RMS Overload Acoustic Pressure [dB, re 1µPa]: N/A
Maximum Operating Depth [m]: 500
Operating Temperature Range [ºC]: -25 to 60 (calibration guaranteed in the range -5..+30C)
Capacitance [nF]: 12
Dimensions [mm]: 85 L x 32 dia
Coaxial Cable Length: 15 meters, Cable terminated with male BNC or mono phone plug connector (longer cable optional)
Directionality: omnidirectional below 10kHz
Battery / Connector box: power not required
Requires a preamplifier with 100MOhm input impedance, such as the Reson VP1000 or Reson VP2000 preamplifiers (on the left).
If a preamplifier with 1MOhm input impedance is used, 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.
- extra length ruggedized cable
- custom orders not listed above
- hydrophone may be used with either the optional Reson VP1000 or Reson VP2000 preamplifiers.