SQ26-VR Hydrophone

The SQ26-VR has been discontinued. See the SQ26-H1B hydrophone for a stand alone general purpose hydrophone for kayaking and other recreational activities.

SQ26-VR hydrophone with cable

This information is retained for reference.

  • SQ26-VR hydrophone
  • SQ26-VR hydrophone
  • SQ26-VR hydrophone

    The Sensor Technology SQ26-VR hydrophone is powered by a small voice recorder.

  • SQ26-VR hydrophone

    The Sensor Technology SQ26-VR hydrophone is powered by a small voice recorder.


SQ26-VR hydrophone specifications
Frequency Range [kHz] 0.020 to 20
Transducer Sensitivity* [dB, re 1V/µPa] -194
Preamplifier Gain [dB] 25
Effective Sensitivity* [dB, re 1V/µPa] -169
SPL Equiv. Self Noise at 1kHz [dB, re 1µPa/√Hz] 57
Power Requirement] 2x AAA batteries
RMS Overload Acoustic Pressure [dB, re 1µPa] 147 to 154
Maximum Operating Depth [m] 100
Operating Temperature Range [°C] -25 to 60
Hydrophone Dimensions [mm] 70 L x 32 dia.
Shielded Cable Length [m]
cable includes 1/4" stereo phone plug
10 or 30
Directionality omnidirectional below 10kHz
*  Transducer Sensitivity + Preamplifier Gain = Effective Sensitivity.

Recorder - Power

Standard signal connection for the SQ26-VR is through a 3.5mm stereo phone jack. The hydrophone is powered by a small voice recorder that uses two AAA batteries (batteries not included).

Signal / Headphone Output 3.5mm stereo phone jack
Battery Life [hours] 34
Selectable Sensitivity High or Low with auto gain
Recorder Dimensions [cm] 11.5 Long x 3.7 wide x 2.0 high