MacArtney Group supplies a 12-unit turnkey solution for the Danish Environmental Protection Agency, says an article published on their website.
About the MacArtney’s solution
The solution features three different water sampler configurations in dedicated frames – which will help the Danish Environmental Protection Agency (EPA) document marine conditions in Danish waters was made possible by MacArtney’s skilled and professional workshop staff.
The solution comprises a high-tech toolkit for measuring Danish waters, enabling EPA’s oceanographers to measure a full range of parameters:
- CTD – Conductivity, Temperature, Depth
- Fluorescence
- Yellow matter (CDOM)
- Dissolved oxygen
- PAR (Photosynthetically Active Radiation)
What is CTD?
The CTD is one of the most commonly used tools by an oceanographer. This provides detailed profile and time-series data on the measured parameters of conductivity, temperature and depth.
Today’s digital sampling techniques ensure a high level of accuracy, and the sample bottles are programmable for specific depths and intervals.
Stable and reliable data
Each of the 12 units in MacArtney’s solution presents marine scientists with real-time data and data logging. Any collected water specimens can be verified on-site or in laboratories later.
“It has been a tremendous pleasure to work with the Danish Environmental Protection Agency. Having such a professional and constructive partner involved in the process has enabled MacArtney to identify the right technical solution,” explains Lars Jørgensen, Head of Product Management for MacArtney A/S.
“Designing dedicated frames that allow single-user operations is part and parcel of MacArtney’s philosophy of supplying safe-to-handle equipment that provides the client with stable and reliable data.”
The full scope of supply
During the design process, time and cost-saving service procedures were carefully considered, and a running service/maintenance agreement is included.
The supply scope includes seven units with:
- one all-electrical sensor,
- two units with two 4.5-litre Niskin water sample bottles, and
- three units on a specially customised Seabird 32 carousel water sampler frame.
All 12 units can reach a maximum depth of 100 metres and feed data to MacArtney designed and produced topsides.
PAR sensors
Furthermore, three are supplied with dedicated upwards and downwards-looking photosynthetically active radiation (PAR) sensors, which measure photosynthetic light levels in the water.
Deployable manually
All the units are either deployable manually from small boats, such as rigid inflatable boats (RIB) or via a small winch or hand winch. Over half of the units can be operated by just one person, making them extremely practical and versatile.
What are the design benefits?
Usually, a Seabird 32 carousel water sampler frame carries 12 bottles but in this case, due to a higher mounting of the electronics – with two pipes instead of a frame – it only holds 10 bottles.
This design’s benefit is a reduced lifting height by 0.5 metres, meaning the carousel is still manageable on smaller boats with smaller winches.
Cost and time
This saves time and money on the annual calibration, as just two hose clips need loosening to remove and reinsert the gear.
Lars Jørgensen:
Our skilled workshop team has been inventive in devising usable, practical solutions for both small vessels and larger ships. The mounting of the electronics on the carousel is, quite simply, a stroke of genius
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Source: MacArtney
