2025 SMSI Bannerklein

P07 - Design of a highly accurate low-cost thermistor-based sensor for the measurement of water surface temperatures in maritime research

Event
22. GMA/ITG-Fachtagung Sensoren und Messsysteme 2024
2024-06-11 - 2024-06-12
Nürnberg
Band
Poster
Chapter
Poster
Author(s)
F. Klar, N. Torz, T. Kern - Technische Universität Hamburg,Hamburg
Pages
430 - 437
DOI
10.5162/sensoren2024/P07
ISBN
978-3-910600-01-0
Price
free

Abstract

In climate and oceanographic research, precise temperature measurements within the very limited temperature range of the ocean are essential. This paper covers the design and analysis of a temperature sensor that measures with millikelvin accuracy. The first prototype has an energy consumption of 84.64 mWs with a sampling time of 10 seconds per measurement and a component cost of less than 100 EUR. The proposed design is able to measure within 6 mK accuracy on a subset measurement range despite a simple three-point calibration. The core circuit is enhanced with two temperature sensing elements to allow for an increase in sensor sensitivity. A further approach on sensor readout is proposed and analyzed, showing good potential in combination with linearized temperature compensation for the major part of this sensors range.

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