The RASP 19 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.

Several other hydrophones models are available for integration, including the Aquarian Audio H2c, the Aquarian Scientific AS-1 and the whole series of Cetacean Research Technology sensors.

The canister is delivered with a battery set, and can go down to -500m, 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 via bluetooth connection and a custom software for your Android phone, can be set to follow a duty-cycle scheme (record for an x period and then pause for a y period) or specific time intervals (record from xx:xx to yy:yy and then again from zz:zz to tt:tt …).

The RASP 19, with its DODOTRONIC board, is probably the most flexible acoustic monitoring device on the market.

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 early 2019.
A first production batch is already scheduled by November 2018.
The pre-production units are being tested at sea right now.
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