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The RASP18 is delivered with a customized DODOTRONIC recording board sampling at 384kHz set in a plexiglas canister.

The standard hydrophone is a Sensor Technology SQ26-05 pre-amplified hydrophone on one cap, but several hydrophones are available for integration, including the Aquarian Audio H2c, the AS-1 and more.

The canister is delivered with a battery set, and can go down to -300m, depending on the provided hydrophone.

A custom preamp has been developed to fit the levels and the output impedance of the hydrophones, providing a no-noise signal to the recorder.

Three o-rings on each end provide extra resistance to high pressures, while the 1cm wall safely keeps the instrument dry.

Programmable both with duty-cycle schemes (record for an x period and then pause for a y period) or with specific intervals (record from xx:xx to yy:yy and then again from zz:zz to tt:tt …), the RASP18 is the most flexible instrument we have ever made.

Battery capacity delivers weeks of sampling, all stored on the mSD on the board. A precise RTC (real-time clock) marks the recordings on the filename for later analysis.

Currently under field-testing this unit will be commercially available by late 2018.
A first production batch is already scheduled by September 2018.
The pre-production units are being tested at sea right now.
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