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ENVIRO NAUTA

In-situ gamma spectrometry, in fresh water and sea water — measuring where the water stands, instead of carrying samples ashore.

What this page says

This page reproduces the state of things so far, no more than that. Unlike the ENVIRO GO and the two cabin stations, there is at present no product description with substantiated figures for ENVIRO NAUTA. The four figures below come from the previous website; they are confirmed neither by a measurement nor by a data sheet.

For that reason we state no detection limits here. For a tender we establish them case by case — under water they depend more strongly on the location than on the instrument anyway.

Key figures

Four details from what exists

Operating depth
to 100 m
Medium
Fresh water and sea water
Data storage
up to 5 years
Power consumption
under 2 W

Power consumption is the figure that matters: under 2 W an instrument can be run from a battery for months, with no cable to the shore. Together with the data storage on board, that gives the operating case ENVIRO NAUTA is intended for — put it out, leave it lying, read it out later.

All four values come from the previous website. The conditions under which they apply — water temperature, sampling rate, detector type — are not documented.

What for

Where a water sample comes too late

Taking a sample, bringing it to the laboratory and measuring it there takes days and gives a single point in time. Measuring in situ gives a series.

Environmental monitoringContinuous measurement at a body of water, without anyone having to go out to take samples.
Power plant surroundingsCooling water outlet and receiving water, continuously instead of by spot samples.
ResearchLong measurement series at the same place, with a detector determined by the question being asked.
Harbour and coastSea water with its higher salt load, where a laboratory sample takes considerable preparation.
Image placeholder There is no image material for ENVIRO NAUTA. As soon as a photograph of the instrument or a sectional drawing exists, it will go in this place.
Construction

Pressure housing, detector, multichannel analyser

Detector Freely chosen, not prescribed Scintillators such as NaI(Tl), CsI(Tl), LaBr₃ and CeBr₃, or alternatively a semiconductor detector up to high-purity germanium. Under water, power consumption argues against a cooled detector — the task decides in the end.
Evaluation Multichannel analyser on board The full spectrum is recorded, not cut down to a single count. The measurement parameters and the sampling interval are adjustable.
Data In the instrument until they are collected The data storage on board is designed for long deployment periods. Output of raw data and spectra in common formats, Ethernet and RS485 interfaces.
Integration Single instrument or network Intended for operation as a single instrument as well as part of a distributed monitoring network, with remote access to the measurement parameters.

Details from the previous website. The pressure housing, the material, the sealing concept and the approval for use in sea water are not documented and are to be established case by case.

Enquiry

Tell us which body of water and which nuclide

For a sound conversation, the body of water and its salinity, the nuclide being looked for, the operating depth and the planned interval between two servicings are enough.

To contact All instruments