Marine Biology (2+1)

Bottle samplers-I

FRIEDINGER'S WATER SAMPLER

It has a cylindrical portion made of plexiglass or Perspex and is with two hinged covers. During operation, the sampler is sent down in an open state to the desired depth and can be closed by a drop weight messenger (a weight drilled out, so that, it will slide down the wire rope in order to remove or attach it, either hinged or slotted) which falls down inside a sliding rail and closes the covers and makes the bottle water-tight. By this way, the water together with the planktonic organisms of the specified column is trapped inside.