External spring type Niskin water sampler ~Niskin X~

 Niskin water samplers are constructed with a metal spring or rubber tubing placed inside the sampling cylinder. This structure may cause the seawater sample to come into contact with the spring or tubing, resulting in the elution of components into the seawater sample that may affect the seawater analysis value. The "External Spring Niskin Bottle," also known as the "Niskin X" water sampler, was developed to eliminate such contamination of seawater samples. The upper and lower lids of the Niskin X water sampler are connected by two springs placed on the outside of the sampling bottle and nylon threads, and the lid has an arm-like guide for threading the nylon threads ( Fig. 13 ). With this structure, there are no more springs or tubes in contact with the seawater sample inside the water sampler tube.

Fig. 13 Structure of Niskin X water sampler

蓋閉鎖バネ　Lid closing spring

ナイロンテグス　Nylon Tegs

ガイド　Guide