---
title: Effective Slurry Concentration Using Refractive Index Recorded Webinar
description: Join Tracy Gast, as he introduces a new liquid concentration monitor based on IoR technology that offers high accuracy and repeatability with an optional automated in situ window cleaner to ensure measure stability over time.
image: https://info.entegris.com/hubfs/tracy-generic-facebook-11265-1200x630-1.jpg
---

<https://www.entegris.com/content/entegris-live/en/home.html>

![tracy-generic-hubspot-11265-desktop-1918x568-1](https://info.entegris.com/hubfs/tracy-generic-hubspot-11265-desktop-1918x568-1.jpg)

# Effective Slurry Concentration Monitoring Using Refractive Index

### Recorded webinar

Understanding the amount of solids in slurry is critical to determining an accurate material removal rate (MRR) for CMP solutions. Index of refraction (IoR) technology enables concentration monitoring of turbid and nonconductive materials. 

Entegris is introducing a new liquid concentration monitor based on IoR technology that offers high accuracy and repeatability with an optional automated in situ window cleaner to ensure stability over time. 

Join Tracy Gast, global product applications engineer, as he discusses: 

- Index of refraction technology
- Performance of our new InVue® GV148 liquid concentration monitor in slurry
- Slurry baseline testing with automated in situ window cleaner

#### About the Presenter

![Tracy-white-rev](https://info.entegris.com/hs-fs/hubfs/Tracy-white-rev.jpg?width=182&name=Tracy-white-rev.jpg)Tracy Gast joined Entegris in August 2016 as a global product applications engineer specializing in chemical concentration and dissolved oxygen monitoring. Prior to Entegris, Tracy spent 32 years  
at TEL-FSI as a principal applications engineer responsible for semiconductor applications and equipment development. He has a Bachelor of Science degree in electrical engineering from Minnesota State University, Mankato and holds eight semiconductor processing or equipment related patents.

### Register for Recorded Webinar

- [![Facebook](https://info.entegris.com/hubfs/Entegris_Aug2019/Images/facebook.svg)](https://www.facebook.com/EntegrisInc)
- [![Twitter](https://info.entegris.com/hubfs/Entegris_Aug2019/Images/x-logo.svg)](https://twitter.com/Entegris)
- [![YouTube](https://info.entegris.com/hubfs/Entegris_Aug2019/Images/youtube.svg)](https://www.youtube.com/user/EntegrisInc)
- [![LinkedIn](https://info.entegris.com/hubfs/Entegris_Aug2019/Images/linkedin.svg)](https://www.linkedin.com/company/entegris)
- [![Instagram](https://info.entegris.com/hubfs/Entegris_Aug2019/Images/instagram.svg)](https://www.instagram.com/entegrisinc/)

- [Privacy Policy](https://www.entegris.com/content/entegris-live/en/home/about-us/legal-trademark-notices/privacy-policy.html)
- [Terms & Conditions](https://www.entegris.com/content/entegris-live/en/home/about-us/legal-trademark-notices/terms-and-conditions-of-sale.html)
- [Legal & Trademark Notices](https://www.entegris.com/content/entegris-live/en/home/about-us/legal-trademark-notices.html)

© 1994-2026 Entegris, Inc. All Rights Reserved.