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FP5

BRIMOM Résumé de rapport

Project ID: EVR1-CT-2002-40023
Financé au titre de: FP5-EESD
Pays: United Kingdom

Implementation of Biofouling protection technologies to current and future instrumentation

BRIMOM initially considered a wide range of instruments but necessarily focussed on several key sensors on which the biofouling assessment studies were conducted:
- Optical transmissometers;
- Optical fluorimeters;
- Optical dissolved oxygen;
- Membrane sensors (dissolved oxygen, pH).

All commercial instruments currently available have been developed for scientific purposes where deployment periods may be several hours or days. None have been designed specifically for long term (3-12 months) deployments.

Chelsea Instruments (CI)recognises that the market for in situ instruments is changing with the emphasis on long term deployments and extended data sets. In response to this CI is assessing which are the most suitable boifouling prevention technologies and how existing instruments may be modified. It may be necessary to design bespoke instruments for long term deployments in preference to modifying existing ones.
Biofouling reduction is only one aspect that must be considered. There is the need for more reliable instruments that are designed for use in long term monitoring programmes.

The modification of existing instruments would include material changes, replacing recessed optical windows for flush mounted versions, coating of existing window geometries to incorporate local chlorination, redesigning wipers and brushes to be more effective and modifications to install replaceable hydrogels. This approach may have a higher cost base than above, but will enable manufacturers an early entry into the market.

A new design enables manufacturers to address all these areas at the early stages of development. Production design and production costs can be assessed in order to keep the instrumentation competitive. The design must be simple to operate and easy to maintain by the user. Downtime must be minimised when returning to the manufacture for service and calibration. Therefore instruments must also be easy for the manufacturer to diagnose faults and repair. Collaboration with scientists and end users will ensure that appropriate technologies are incorporated, with future stretch potential.

There will be significant costs associated with the development and design of new instrumentation. It will be very important to correctly confirm the market requirements for each instrument. This will most likely be a system approach where interface specification data will be as import as the other design criteria.

Informations connexes

Reported by

Chelsea Instruments Ltd
55 Central Avenue
KT8 2QZ West Molesey
United Kingdom
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