# Flexible temperature–depth sensor from Chinese Academy of Sciences institute tested at 4812.2 m depth

- Published: 2026-11-08 18:47 UTC
- Section: Science › Instruments & experiments
- Tags: flexible temperature–depth sensor, deep-sea measurements, laser-induced graphene, graphene PDMS composite, 4812.2 m trials, 50 MPa hydrostatic pressure, low-power electronics, Nature Communications
- URL: https://realtech.media/news/rt-0a77aebfecf4a439c811a8f0_flexible_temperature_depth/

**A prototype sensor with a graphene–PDMS element withstood about 50 MPa in deep-sea trials. It is meant for curved and mobile platforms where rigid instruments do not fit.**

![Flexible temperature–depth sensor from Chinese Academy of Sciences institute tested at 4812.2 m depth](https://realtech.media/media/2026/11/1316c1597cb41f02.jpg)
*Bernard Bourles, Wikimedia Commons, CC BY 4.0*

Researchers at the Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences (Sanya), have described a fully integrated flexible temperature–depth sensor in Nature Communications. The device is designed to be mounted on curved and mobile surfaces for deep-sea measurements. In deep-sea trials to 4812.2 m, it kept its structural integrity under about 50 MPa of hydrostatic pressure [1].

According to the authors, the deep ocean shapes global heat transport, carbon cycling and abyssal circulation, yet large regions remain undersampled. Conventional instruments give precise single-point measurements, but their rigidity and weight limit their use on emerging platforms that could extend observational reach [1].

## Sensing element and electronics

The sensing element is a porous composite of laser-induced graphene and polydimethylsiloxane (PDMS). It covers a measurement range of 0–10 MPa hydrostatic pressure [1].

The electronics unit is compact, lightweight, stress-adaptive and low-power, with an average quiescent current of 24.63 µA. The authors describe the sensor and electronics as a co-designed cyber–physical platform [1].

## Compensation and accuracy

Temperature–pressure compensation combines a data-driven algorithm with polynomial fitting. With it, the sensor shows a depth error of ≤±0.91% of full scale and a temperature accuracy of ≤±0.29 °C [1].

The deep-sea trials reached 4812.2 m. The authors report that the structure remained intact under about 50 MPa of hydrostatic pressure, which they take as evidence of durability in extreme environments [1].

The authors state that the design makes sensing possible on platforms inaccessible to conventional instruments. The work describes a laboratory-built device tested in sea trials, not a commercial product [1].

## Sources

1. [Nature Communications](https://doi.org/10.1038/s41467-026-78009-7)

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