# LumiTac preprint demonstrates compact sensor measuring forces and twisting loads

_Published Wednesday, November 4, 2026 at 9:25 PM EST · Robotics, Science · Latest · Tier 2 — Notable_

Researchers present LumiTac, a tactile sensor that reconstructs three force and three moment components, in a robotics preprint. Its sensing head measures 12 mm in diameter and 4.75 mm in thickness, weighs less than 2 g and has a component cost of approximately USD 7.

The camera-free design measures how loads change light passing through translucent silicone between circuit boards. A neural network converts 20 optical channels into load measurements. Online prediction averaged 303.57 Hz, with median software processing latency of 0.722 ms.

Tests reported mean absolute force errors of 0.054-0.190 N. Robotic demonstrations covered tactile-guided manipulation and physical human-robot interaction; the findings remain preprint results.

## Sources

- [arXiv Query: search_query=cat:cs.RO&id_list=&start=0&max_results=30](https://arxiv.org/abs/2611.05936v1)

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Canonical: https://techandbusiness.org/newswire/93h94Fzcmoi4MgybFt6rSl
Published: 2026-11-05T02:25:24.087Z
Story chronology: 2026-11-04T04:24:45.000Z
Retrieved: 2026-11-05T04:52:13.156Z
Publisher: Tech & Business (techandbusiness.org)