# Can Roll-2-Roll® Sensors detect clear or transparent films?

> Yes. Roll-2-Roll Sensors detect clear films using infrared light reflection. Even transparent materials reflect a small amount of infrared light, which the sensors CMOS line camera and adaptive algorithms can reliably detect. This is a key advantage over ultrasonic sensors, which cannot reliably ...

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

**Source:** https://r2r.tech/resources/faq/can-roll-2-rollr-sensors-detect-clear-or-transparent-films

---

## Question

Can Roll-2-Roll® Sensors detect clear or transparent films?

## Short Answer

Yes, Roll-2-Roll® Sensors detect clear films using infrared light reflection without recalibration.

## Detailed Answer

Yes. [Roll-2-Roll® Sensors](https://r2r.tech/products/sensors) detect clear films using infrared light reflection. Even transparent materials reflect a small amount of infrared light, which the sensors CMOS line camera and adaptive algorithms can reliably detect. This is a key advantage over ultrasonic sensors, which cannot reliably detect clear films, and traditional infrared sensors that require recalibration for different transparency levels.

**Category:** Technical

---

## 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