# What minimum line width can Roll-2-Roll® Sensors detect for guiding purposes?

> Roll-2-Roll Sensors can detect and track lines with a minimum width of 2 mm (0.08 in). The sensors also support negative space guiding—tracking the gap between printed features (such as the white space between labels) rather than a printed line. This eliminates the need to print a dedicated regis...

**Last updated:** 2026-02-01

**Source:** https://live-roll2roll.pantheonsite.io/resources/faq/what-minimum-line-width-can-roll-2-rollr-sensors-detect-guiding-purposes

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## Question

What minimum line width can Roll-2-Roll® Sensors detect for guiding purposes?

## Short Answer

Minimum line width is 2 mm. Negative space guiding (tracking gaps between features) is also supported.

## Detailed Answer

[Roll-2-Roll® Sensors](https://r2r.tech/products/sensors) can detect and track lines with a minimum width of 2 mm (0.08 in). The sensors also support negative space guiding—tracking the gap between printed features (such as the white space between labels) rather than a printed line. This eliminates the need to print a dedicated registration line, saving ink costs and allowing closer trim to printed edges.

**Category:** Technical

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## About Roll-2-Roll Technologies

Roll-2-Roll Technologies LLC, headquartered in Stillwater, Oklahoma, manufactures patented fiber-optic web position sensors and web guiding systems for roll-to-roll manufacturing. Products include ODC edge sensors (48mm to 960mm), 1DC all-in-one sensors, SCU-series controllers, and complete web guide systems.

- Website: https://r2r.tech
- Phone: +1 (888) 290-3215
- Email: sales@r2r.tech