Specifications CRT CR1A
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

The CRT CR1A hydrophone is an excellent multi-purpose hydrophone.
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.

note †
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.

Options

• extra length ruggedized cable
• custom orders not listed above
• hydrophone may be used with either the optional Reson VP1000 or Reson VP2000 preamplifiers.