4420/4420R 4520/4520R 4830/4830R 4930/4930R






Shallow Water X X X X X / - / - / X
Intermediate Water X X X5 X5 - / X / - / -
Deep Water X X - / - / - / X
AiCaP1 X / – X / – X / – X / – X / – / – X / – X / X / X / –
RS-232 X / – X / – X / – X / – – / – / X – / X X / X / X / –
RS-4222 – / X – / X – / X – / X – / X / – – / X - / - / – / X
In-line X X
Temperature X X X3
Z-Pulse4 X X X X X X
Profiler X
Single point X X X X X X
Extra sensor connection X

1 The Seaguard platform and the smart sensor are interfaced by means of a reliable CANbus interface (AiCaP), using XML for plug and play capabilities.

2 RS-422 output for use as stand-alone sensor with long cables.

Integrated temperature sensor 4080 in the DCPS calibrated on request

4 ZPulse technology which improves the statistical precision. Complex acoustic pulses comprising several distinct frequencies are combined into a single acoustic pulse. The ZPulse based DCS separates the received signal into different frequency bands, one for each frequency in the transmitted signal. Further it analyses the frequency shift using a high speed Digital Signal Processor using an ARMA based parametric model processing algorithm to find the Doppler shift frequencies. This multi-frequency technique reduces the required number of pings needed in order to achieve an acceptable statistical error. The achieved measurement precision is proportional to the inverse of the square root of the number of ping measurements in a measurement interval. The ZPulse DCS uses two frequencies and this gives a reduction by a factor square root of two compared to a single frequency sensor. A single frequency sensor needs twice the number of ping to achieve the same precision as the Zpulse DCS.

5 Maximum depth range 2000 meter

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