# Do I need two sensors for center guiding?

> Not necessarily. Roll-2-Roll offers two approaches: For wide webs with significant width variation, use two sensors mounted on opposite sides. For narrow to medium webs (up to 960 mm), a single wide sensor like the odc 480, odc 768, or odc 960 can see both edges simultaneously. The single-sensor ...

**Last updated:** 2026-01-31

**Source:** https://live-roll2roll.pantheonsite.io/resources/faq/do-i-need-two-sensors-center-guiding

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## Question

Do I need two sensors for center guiding?

## Short Answer

No. Single wide sensors (up to 960mm) can see both edges. Wide webs may need two sensors.

## Detailed Answer

Not necessarily. Roll-2-Roll offers two approaches: For wide webs with significant width variation, use two sensors mounted on opposite sides. For narrow to medium webs (up to 960 mm), a single wide sensor like the [ODC 480](https://r2r.tech/products/sensors/odc-480), [ODC 768](https://r2r.tech/products/sensors/odc-768), or [ODC 960](https://r2r.tech/products/sensors/odc-960) can see both edges simultaneously. The single-sensor approach simplifies installation (no alignment between sensors required) and works well for label converting, battery electrode, and narrow web applications.

**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