In environments where instruments are likely to be significantly exposed to sea/salt water (corrosive) or sand/dust (abrasive) it is advised that the "marine" versions of our instruments be used in order that best performance and reliability is obtained in service. For applications requiring "First Class" performance (wind assessment etc) the standard instruments will however produce better results than the /WR versions (as the /WR versions have not been fully tested to determine their classification).

The "marine" versions of the instruments have improved sealing and there are options for rotors and fins with longer/different "skirts" to reduce the likelihood of ingress of water or dust.