A Salinity–Temperature Sensor Based on Microwave Resonance Reflection

Bogucki, Darek J.; Snowdon, Tom; Doerr, Jennifer C.; Serafy, Joseph E.

doi:10.3390/s22155915

i

A Salinity–Temperature Sensor Based on Microwave Resonance Reflection

2022
By Bogucki, Darek J. ; Snowdon, Tom ; Doerr, Jennifer C. ; ...

Details

Journal Title:

Sensors
Personal Author:

Bogucki, Darek J. ; Snowdon, Tom ; Doerr, Jennifer C. ; Serafy, Joseph E.
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SEFSC (Southeast Fisheries Science Center)
Description:

We developed and tested a microwave in situ salinity sensor (MiSSo) to simultaneously measure salinity and temperature within the same water sample over broad ranges of salinity (S) (3–50 psu) and temperature (T) (3–30 °C). Modern aquatic S sensors rely on measurements of conductivity (C) between a set of electrodes contained within a small volume of water. To determine water salt content or S, conductivity, or C, measurements must be augmented with concurrent T measurements from the same water volume. In practice, modern S sensors do not sample C and T within the same volume, resulting in the S determination characterized by measurement artifacts. These artifacts render processing vast amounts of available C and T data to derive S time-consuming and generally preclude automated processing. Our MiSSo approach eliminates the need for an additional T sensor, as it permits us to concurrently determine the sample S and T within the same water volume. Laboratory trials demonstrated the MiSSo accuracy of S and T measurements to be <0.1 psu and <0.1 °C, respectively, when using microwave reflections at 11 distinct frequencies. Each measurement took 0.1 μs. Our results demonstrate a new physical method that permits the accurate S and T determination within the same water volume.
Keywords:

Environmental Monitoring Water Salinization Water Temperature Environmental Monitoring Water Salinization Water Temperature Analytical Chemistry Aquatic Salinity Measurements Aquatic Temperature Measurements Atomic And Molecular Physics, And Optics Biochemistry Electrical And Electronic Engineering Environmental Monitoring Instrumentation
Source:

Sensors, 22(15), 5915
DOI:

https://doi.org/10.3390/s22155915
Document Type:

Journal Article
Funding:

Grant no. 1333MF21PNFFN0036
License:

https://creativecommons.org/licenses/by/4.0/
Rights Information:

CC BY
Compliance:

Submitted
Main Document Checksum:

urn:sha256:dc45980efff9948a52e9fa08599a16193efa2cac9466d9b41e7e98d2b103bbc5
Download URL:

https://repository.library.noaa.gov/view/noaa/48130/noaa_48130_DS1.pdf
File Type:

[PDF - 881.26 KB ]

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