The Aanderaa Current Sensors are available in a profiling and a single-point version with three depth ratings. We offer Doppler Current Profiler Sensor, Doppler Current Sensor and the In-line ZPulse Doppler Current Sensor.
The Doppler Current Profiler Sensor (DCPS) is a medium range, 600kHz current profiler smart sensor. It features innovative development of the acoustic profiling ability to collect high quality current information also on moving and tilting platforms. The 5400/5400R version of the current sensor is 300m depth rated, the 5402/5402R version is 4500m depth rated and the 5403/5403R version is 6000m depth rated and is intended for commercial as well as research use. It comes with an integrated temperature sensor that can be calibrated on request.
The Aanderaa Doppler Current Sensor is a rugged, true vector averaging current sensor for measuring current speed and direction in the sea. The sensor has built-in compass and tilt sensor and may also output sea temperature. The speed range is 0 to 300 cm/s. Low current drain and flexible sampling schemes. New multi-frequency (DCS) with ZPulse technology achieves better performance using only half the power than previous models. The new, fast response compass and tilt circuitry has no moving parts achieving excellent performance in unstable areas such as in the wave zone close to surface.
The inline ZPulse Doppler Current Sensor has been designed in order to easily integrate into systems offering a compact and elegant solution. The sensor is based on a modified version of the ZPulse DCS 4520. The unit connects to a combined mooring and signal cable in one end and allow for connection of a continuation cable at the opposite end. The inline current sensor can hold a load of up to 1300 kg. It has been developed to replace the previous Aanderaa DCS 4100 using newer technology and extending capabilities.
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.
3 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