Cost-efficient oceanographic instrument with microfabricated sensors for measuring conductivity, temperature and depth of seawater

Možek, Matej (avtor), Pečar, Borut (avtor), Vrtačnik, Danilo (avtor)

The design, fabrication and characterization of a cost-efficient oceanographic instrument with microfabricated sensors for measuring conductivity, temperature and depth of seawater are presented. Conductivity and temperature sensors were fabricated using MEMS technology, which allows for customized small footprints and low production costs. Dedicated electronics for reading, processing and storing acquired sensor data are described. The developed instrument enables the measurement of seawater conductivity in a range from 4 mS/cm to 70 mS/cm. The conductivity measurement is temperature-compensated in the range from 2 °C to 40 °C, with an accuracy of ±0.1 mS/cm. The temperature sensor’s stability is 0.025 °C. The depth/pressure measurement range is up to 2000 m/200 bar, with a resolution of 0.1 bar. Temperature and conductivity sensor performance was assessed using laboratory equipment and designed electronics. The conductivity sensor was temperature-compensated to 0.01 mS/cm. The conductivity sensor electrode corrosion effect is presented below and was eliminated through adaptation of a signal acquisition circuit. Custom software was developed for monitoring critical conductivity sensor parameters (currents, voltages). A variation of 0.4% between cell conductance currents and voltages was established as a criterion for stable conductivity sensor operation.

• Jezik: Angleški jezik
• Ključne besede: microfabrication, MEMS, conductivity, temperature, depth, NAUTILOS, marine measurement
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2024
• Št. strani: 28 str.
• Številčenje: Vol. 24, iss. 12, [article no.] 3940
• PID: 20.500.12556/RUL-158886
• UDK: 621.3.049.77
• ISSN pri članku: 1424-8220
• DOI: 10.3390/s24123940
• COBISS.SI-ID: 199466755
• Datum objave v RUL: 21.06.2024

Gradivo je del revije

• Naslov: Sensors
• Skrajšan naslov: Sensors
• Založnik: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: mikroobdelava, MEMS, prevodnost, temperatura, globina, NAUTILOS, meritve morja

Projekti

• Financer: EC - European Commission
• Številka projekta: 101000825
• Naslov: New Approach to Underwater Technologies for Innovative, Low-cost Ocean obServation
• Akronim: NAUTILOS