RASP

Registratore Acustico Subacqueo Programmabile

Programmable Underwater Acoustic Recorder

A simple instrument, for underwater acoustic monitoring, with a good quality and a low price.
Suitable to monitor water volumes ranging from nets' proximity to hot-spots, Marine Protected Areas, straits or rivers, RASPs offer a simple instrument than can be deployed and recovered from a RIB (see our sample deployment video).

Acoustic bottom recorder. Deployment and recovery. Electrolytic acoustic release.

Based on commercial recorders (m-audio microtack II, recording on compact flash memory, offering up to 48kHz in bandwidth at 24 bits, and on a customized acquisition board, recording on standard usb devices, offering 20kHz bandwidth at 16 bits / stereo. A custom control circuit has been designed and programmed to offer full programmability of the units. RASPs can record acoustic signals following a time schedule, only limited by available memory and battery capacity.

MODELS

MT 100
Based on m-audio microtrack II, currently supports up to 64GByte compact flash cards. The battery is the recorder's internal battery plus a 1400mA NiMH additional recharcheable battery. Featured with a Sensor Technology SQ26 or CRT hydrophone, is set into an aluminium canister, just a bit larger than the recorder itself.
Goes down to -100 meters and is suitable to monitor continous underwater acoustic events, like dolphin attacks over nets.

MT 150US
Based on m-audio microtrack II with a custom made programmable timer, currently supports up to 64GByte compact flash cards. The battery pack has a 12.000mA nominal capacity and is made of NiMH fast rechargeable cells with an ultra-low-dropout voltage regulator. Uses a Sensor Technology SQ26 hydrophone (other hydrophones can be selected). It is fit into an aluminium canister, 9cm diameter and 30cm tall,

MT 200
Same as the MT 150US model, the MT 200 has a 26.000mA battery pack, in longer canister (50cm).