Pinpoint Multiple HVAC/R Leaks with UV Dye

  • Fluoresces Brighter

  • 2 Microns

  • Exclusive Patent

  • Stability Improvement

  • Environmentally Safer

  • Improved Shelf Life

Pinpoint AC Leaks with OEM Grade UV Dye

How does HVAC/R Leak Detection work? Leaks in any size AC&R system; residential, commercial or large industrial facilities, can very quickly become a major concern. Too often, the true consequences of not having a reliable leak detection/preventive maintenance program in place can go unappreciated until it is too late. The loss of a “little” refrigerant or lubricant can lead to far more than just inconvenience. Left undetected, even the smallest refrigerant leak can grow into major problems.

Spectroline® fluorescent dyes are proven to be fastest, easiest and most cost-effective way to pinpoint air condition leaks, confirm repairs and be a key part of your comprehensive preventive maintenance program. You never need to flush them out, so they can stay safely in the system, working for you 24/7 to find any future leaks.


HVAC/R Leaks from spectroline
  • ARGLO 5E from Spectroline

    Universal/POE Dye

  • A2L Compatible

  • Co-Solvent Free Dye from Spectroline

    Co-Solvent Free

  • NSF

    NSF Certified

  • Made in USA

Spectroline® offers a wide range of products developed to pinpoint the exact source of every leak in any air conditioning, refrigeration or industrial facilities system, including OEM-Grade fluorescent dyes, high performance leak detection lamps, kits and specialty products, all designed to meet and surpass the demanding requirements of you – the HVAC/R professional.

HVAC/R Leak Detection Testimonials

Our dyes are used to pinpoint leaks all around the world from small residential to medium and large commercial HVAC systems.

“The Spectroline HVAC Fluorescent Leak Detection System has proven itself in situations where other leak detection devices have failed to yield a pinpoint location. At CANDU 3 Operations, the system has paid for itself in only a few applications.”

G. Tanner

“We have been installing the Spectroline AR-GLO Leak Detection Material into our self-contained rooftop air conditioning for supermarkets at our factory for a year. Our field service personnel are directed to use the Spectroline Leak Detection System whenever refrigerant losses are suspected. It has been very effective in preventing field problems due to small, unobtrusive leaks.”

Grant M. B.

“Our service department at the Mpls. Branch of Landis & Gyr Powers, Inc. has been using Spectronics fluorescent leak detection system for about one year. It has been a tremendous aid in finding small leaks in air conditioning systems. We are presently adding the fluorescent solution to air conditioning equipment that we have service agreements on. We feel with this method we are able to leak check the system more effectively with less labor.”

Ken L.

“Lafayette College had a refrigeration leak that we could not find. We spent three days trying to detect the leak on our own and then purchased your leak detection system. Making the purchase proved to be an invaluable decision! After adding AR-GLO to our refrigeration system, our technician found the leak in 15 minutes. I am impressed with the proficiency of your product… the system has already paid for itself in saving on labor costs alone.”

Robert M.

“This was a BITZER Walk In Chiller Compressors, and the freezer was storing food and they had a problem with locating leaks for the past 8 months. The food was getting spoiled. By introducing Spectroline dyes, they located 3 leaks in 10 minutes which they could not locate earlier. They are happy with Spectroline dyes.”

Anuroop J.

“We had a leak in a domestic refrigerator that was about an ounce a year. This would be impossible to find with any conventional means. AR-GLO was added to the system, and within five minutes, a pinhole leak was found in a solder joint. I would like to thank you for a very effective and money saving product.”

Roger S.

HVAC/R Leak Detection with Fluorescent Dye

Fluorescent Leak Detection is an extremely accurate and effective way to find HVAC/R leaks. That being said, it’s important to choose a brand who produces pure, safe, highly concentrated dyes and quality inspection lamps to get the most benefit from the technology.


2023 HVAC White Paper from Spectroline

What is fluorescent leak detection?

Which dyes are safe to use in my HVAC system? What kind of lamp should I use?

These questions and more are answered in the FREE guide which presents an in-depth look at a more advanced form of preventative maintenance and leak detection.

Learn More

Answers to Popular Questions

Why is Spectroline trusted by more OEMs than any other brand?

Spectronics Corporation invented fluorescent leak detection in 1955. Today, we are the world’s leading manufacturer of ultraviolet equipment and fluorescent leak detection dye. Spectroline products are the first and only choice for AC&R professionals. Our OEM-approved fluorescent dyes are co-solvent free, NSF certified, and can safely remain within AC&R systems.

How do I use fluorescent leak detection dye?

Simply add our patented fluorescent dye to the suspect system. Let the dye circulate. Once the dye has permeated the system, scan for leaks with one of our high-intensity leak detection flashlights. All leak sites will glow brightly with escaping fluorescent dye.

Which injection method should I use?

Use our EZ-Ject™ or GLO-STICK® injection method for small-to-medium sized AC&R systems – such as residential units, ice machines, window units, and refrigerators. Use our BigEZ™ injection method for medium-to-large sized AC&R systems – e.g., commercial units, supermarket units, refrigerated warehouses, food and dairy plants, and industrial facilities. Review our product dosage information for the correct application.

What are co-solvents and how do they alter system performance?

Co-solvents are chemical substances added to increase the solubility of specific compounds. This means co-solvents harmfully change the original lubricant properties of refrigerant oil. Co-solvents can lead to premature wear and outright damage. Poorly manufactured fluorescent dyes typically contain high levels of co-solvents. In addition to changing system properties, co-solvents have the potential to deteriorate system metals.

Why is dye concentration important?

Dye fluorescence is dependent on the ratio of fluorescent material to carrier oil. Poor performing dyes typically have low levels of fluorescent material. Simply put, poor dyes lack the concentration necessary to provide an effective fluorescent response. Spectroline dyes are concentrated and able to fluoresce all leak areas brightly. This means Spectroline dyes are more economical because less dye is used per application.

How long does it take to find a leak?

In small-to-medium sized systems, you can find leaks within minutes. In commercial systems, it may take a few hours for the dye to circulate completely. For preventative maintenance, add Spectroline dye long before you have a problem. A technician can perform an inspection within a matter of seconds if the dye has already had time to fully circulate.