# Why do Roll-2-Roll® Sensors not require recalibration between materials?

> Roll-2-Roll Sensors use patented fiber-optic technology with adaptive edge detection algorithms. Unlike ultrasonic sensors that measure sound reflection (affected by material density and porosity) or simple infrared sensors that require threshold adjustment, [rr sesors] use spatial light filtering…

**Last updated:** 2026-10-06

**Source:** https://r2r.tech/resources/faq/why-do-roll-2-rollr-sensors-not-require-recalibration-between-materials

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## Question

Why do Roll-2-Roll® Sensors not require recalibration between materials?

## Short Answer

Roll-2-Roll® Sensors use spatial light filtering that automatically adapts to any material properties.

## Detailed Answer

[Roll-2-Roll® Sensors](https://r2r.tech/products/sensors) use patented fiber-optic technology with adaptive edge detection algorithms. Unlike ultrasonic sensors that measure sound reflection (affected by material density and porosity) or simple infrared sensors that require threshold adjustment,  [rr sesors] use spatial light filtering to detect edges regardless of material properties. The fiber array captures scattered light from any material, and the controller's adaptive edge-detection algorithm adjusts to its reflectivity and transparency, so no recalibration is needed—whether running clear films, opaque substrates, metallic foils, or porous nonwovens.

**Category:** Technical

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## About Roll-2-Roll Technologies

Roll-2-Roll Technologies designs and manufactures patented fiber-optic web position sensors and advanced web guiding controllers — the precision measurement and control core of modern roll-to-roll manufacturing. Spun out of Oklahoma State University's Web Handling Research Center and trusted by Fortune 500 medical, battery, and nonwovens manufacturers, our patented sensors work without recalibration, with 0.0635 mm resolution and ±0.127 mm repeatability at line speeds up to 760 m/min — typical customer outcomes are 50%+ less downtime and payback under six months. Headquartered in Stillwater, Oklahoma, our team of PhDs, controls engineers, and industry veterans extends the sensor + controller core into complete web guide systems including stepper-motor-based linear actuators (RLA, BLA, LHS).

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