Sanitary Flow Indicators

Sanitary flow indicators are used in a range of industries requiring clean processes. Pharmaceutical, chemical, and beverage companies often use sanitary flow indicators in their facilities to monitor fluid levels in sterile applications. These versatile sight flow indicators provide critical insight into material output, allowing operators to observe liquid color, direction, flow rate, and clarity through one or more viewing windows.

Sanitary flow indicators assist in maintaining high-quality, reliable output, providing an essential vantage point into process flow. Sanitary sight glasses come in many different varieties to suit varying application needs. At Papailias, we’re dedicated to providing clients with the best sanitary indicators available.

View our catalog of sanitary flow indicators here >> 

Sanitary Flow Indicator Materials and Properties

Depending on the specific type of sanitary flow indicator required, we can design and manufacture several options to meet your exact needs. The bodies of our sanitary sight glasses are available in:

  • 316L stainless steel
  • Hastelloy®

For the gaskets, material options include:

  • EPDM, FEP Jacketed
  • VITON®, FEP Jacketed

Borosilicate is used for the insert material. Optional electropolish finishing is available.

Sanitary Flow Indicator Features

Below are some key features of our sanitary flow indicators:


Our sanitary visual flow indicators are easily cleanable and may be sanitized without having to be manually removed, allowing for less downtime and fewer headaches.


All of our sanitary flow indicators allow for easy sanitization in commercial steam sanitizers, ensuring clean process flow and the elimination of harmful bacteria and germs.


Our sanitary sight flow indicators are all stress, crack and shatter resistant. They’re built to last and can withstand corrosive chemicals and day-to-day use. These indicators are also high-temperature and pressure resistant.


Papailias follows stringent industry standards in the manufacture of sanitary flow indicators. Our products easily meet the requirements of the Food and Drug Administration (FDA) and the American National Standards Institute (ANSI). Finished product contact surfaces meet 3-A specifications and BPE-1997 SFV6 surface requirements for mechanical polishing (MP). 

Sanitary Flow Applications

Sanitary flow indicators are used in a huge range of applications, mainly sanitary and high-purity jobs in which reliable sterilization is key. Common applications and industries include:

  • Food and beverage
  • Pharmaceutical and biopharmaceutical
  • Brewery
  • Dairy
  • High-purity acids
  • Cosmetics
  • High-purity chemicals
  • Ultra-pure water

Working with Papailias

Papailias Inc. is proud to be at the forefront of sanitary flow indicator technology, offering some of the most sophisticated sight flow glasses on the market. With decades of experience and a huge range of customization options, we’ve fine-tuned our processes to meet all of our customer’s exact needs. Whether you require a single component or installation across an extensive network of containers and pipes, we’ll work with you to ensure your output is consistent and easily observable. 

To learn more about our top-of-the-line sanitary flow indicators and discuss how we can help with your unique application, request a quote from the team today. We’re on hand to answer any questions you may have, and can work closely with you throughout the selection process to ensure you receive the best solution for your specific needs.