Self-cleaning conductivity and temperature (CT) sensors, called Compact CT wipers (CTW), were deployed and tested for prevention of bio-fouling in underwater sensors, in Nomi Bay off Japan's southern island of Shikoku between February 6 and March 7, 2004. The effect of bio-fouling on temperature sensors is usually benign, as it does not change the sensor's calibration per se, and any biological growth only affects the time constant of the thermometer. The CTW sensor has a piston-like wiper mechanism that periodically sweeps the measurement cavity in the conductivity sensor. The conductivity cell of the CTW is a seven-electrode cell with a plunger that periodically sweeps the measurement cavity. A piston wiper with a circular silicone blade gently brushes aside the inside of the cell at regular intervals to keep the electrodes and the inside cavity free of growth. During the field test, the total deployment time was 728 hours, and the Compact CTW was moored on a raft next to one original Compact CT sensor at a depth of one meter. Each instrument recorded data sample of conductivity and temperature every 10 minutes. The tests prove that wiper mechanisms are an effective way of preventing bio-fouling in sensors during deployment.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Self-cleaning sensors for long-term moorings


    Additional title:

    Selbstreinigende Sensoren für Langzeit-Vertäuungen


    Contributors:
    Wolk, Fabian (author) / Li, Hua (author)

    Published in:

    Sea Technology ; 46 , 2 ; 43-49


    Publication date :

    2005


    Size :

    7 Seiten



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    SELF-CLEANING SENSORS FOR LONG-TERM MOORINGS

    Wolk, F. / Li, H. | British Library Online Contents | 2005


    Permanent moorings

    Thorpe, T. / Farrell, K.P. | Engineering Index Backfile | 1947


    Modeling of ocean moorings

    McCormick, M.E. | Tema Archive | 1981


    Small craft moorings

    British Library Online Contents | 1996


    Moorings for offshore installations

    NAWRAS HAMDAN | European Patent Office | 2025

    Free access