A mechanical current meter with a paddle-wheel rotor. When the instrument is placed in a mooring the wire connects to the steel rod at the top and at the bottom. The instrument rotates freely around the rod and is pointed into the current by the big vane at the right. The paddle wheel is shielded on one side, so it turns when the current goes past. Below the paddle wheel are sensors for temperature, conductivity and pressure.

© 2000 Aanderaa Instruments, reproduced by permission

contact address: