HY-20 is a complete hydrophone system. You only need a headphone with 3.5mm phone plug
Save 20$ and buy Hydrophone and Amplifier together!

Hydrophone HY-01:
Specification:
Frequency range (-3dB) 20Hz to 100kHz
Transducer Sensitivity[dB, re 1V/µPa] -170
Maximum Operating Depth (tested) 100m
Output impedance >10 Mohm (piezo)
For best results use amplifier with high input impedance >1 Mohm, like HY-11
Operating Temperature Range -15°C to +50°C
Cable length about 3 m (other lenghts on request)
Connector 3.5mm phono mono (or stereo)
Dimension: Diameter 16mm(max), length of piezo 32mm, total lenght with cable gland 45mm (max)
Application;
Mammal - whale Dolphin sound listening/recording
Detect marine mammals for conservation & research
Environmental science & research
High frequency underwater communication, we can tune the piezo to specific frequency on request! Contact to us for more info!
Geophone
Kayaking
Education


Hydrophone Amplifier HY-11
Specification:
Color: Black
Material: Steel
Model: HY-11
Size: 97x60x15mm
Input/Output Port: 3.5mm Studio Input
Lithium Battery Capacity: 2000mAh included
Working Time: More Than 8 Hours
Amp Internal Voltage: 8.3V/1A
Output Power: 40mW @ 16Ω
Adapted Headphone Impedance: 16-150Ω
Low noise SNR:>100dB
THD+N: 0.0003%
Input impedance >= 2Mohm
Pre Amplifier gain 34dB (50x)