Download each products’ specification sheet for more information or contact GeoSpectrum directly with your inquiries.
The M38-100 is a wide-band omni-directional transducer that can be used as both a hydrophone and projector up to 400 kHz. The hydrophone is not suitable for long term marine deployment.
Download the M38-100 Hydrophone Specification Sheet
The M38 is also available as the M38-200, a wide-band omni-directional hydrophone that operates up to 400 kHz. The hydrophone is designed as a reference hydrophone. It comes with a pre-amplified output of 0 to 35 dB (selectable on order) with current or voltage signalling.
|Nominal Voltage Sensitivity (without preamp)||-207 dBV re 1 µPa @ 20°C|
|Frequency Range||1 Hz to 400 kHz|
|TVR at Resonance||140 dB re 1µPa/V @ 1 m|
|Depth Rating||1000 m|
|Storage and Operating Temperatures||-40 to +70°C|
|Size||7.3” length, 1.3” max OD|
|Labelling||Calibration parameters, serial number, date|
|Preamp signalling||Current or voltage (selectable on order)|
|Gain||0 – 35 dB (selectable on order)|
|Input Voltage||6.8 VDC nominal
4.5 – 30 VDC operating range
|Band Pass||20 Hz HPF, no LPF installed (unless otherwise specified)|
|IRN||<30 nV/√Hz @10 Hz
<4 nV/√Hz @1 kHz
|Current Draw||1.3 mA (at 6.8 VDC)
4.2 mA with current signalling preamp
Please contact us for further details or to discuss your specific needs.