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.