Krohne Optiwave 7300C non-contact radar tide gauge

The Krohne Optiwave 7300C radar sensor is a non-contact radar using FMCW (Frequency Modulated Continuous Wave) technology. This measurement technique is based on the frequency scanning principle. Here we measure a frequency difference that is directly linked to the distance between the sensor's reference and the surface measured. The Optiwave uses a K-band microwave signal (around 26 GHz) which scans around 2 GHz. It is gradually replacing the old generation of BM70 sensors at tide gauge sites. It takes up less space, uses much less power and operates at a higher frequency, thus offering more advanced technical characteristics.


Marégraphe radar krohne Opiwave 7300 C en air libre - Observatoire marégraphique de Solenzara (Crédits SHOM 2011). Cliquer sur la figure pour l'agrandir


Tide gauge deployment

The Optiwave can be used in small diameter (typically 80 mm) stainless steel stilling wells which serve both to physically filter the external swell and choppiness and to guide the radar wave. It can also be installed in the open air on a beam fixed to jetties. This method makes it possible to do away with the heavy infrastructure required for stilling wells and works better with warning systems.


Data producer using this type of sensor


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Last updated: 12/12/2012