222 Riverstone Dr Canton ,GA 800-331-2808 info@schoonoverinc.com

Schoonover Inc.

Hydrogen Leak Detector

TLD.1000 Hydrogen Leak Detector - Quantitative 
TLD.500 Hydrogen Leak Detector - High Sensitivity 

Product Information
For More Info
Hydrogen Leak Detector

Hydrogen Leak Detection Applications:

Leak Checking Applications in Manufacturing

  • HVAC Systems
  • Refrigerators
  • Refrigeration Valves
  • Heat Transfer Systems
  • Vacuum Vessels
  • Supermarket Cold Displays
  • Inflatables
  • Other Pressurized Systems

Field Applications

  • Underground Water Lines
  • Underground Transmission Lines
  • Above and Underground Gas Lines
  • Gas Storage Tanks
  • Refrigeration Systems in Retail and Supermarkets
  • Swimming Pools and Pool Piping

For more info on common applications for hydrogen leak detection.


How Our Hydrogen Leak Detectors Work

Our TLD.500 & TLD.1000 hydrogen leak detectors use a hydrogen sensing chip that is activated in the presence of hydrogen. The hydrogen sensing chip is so sensitive, it can sense the trace amounts of hydrogen in an exhale of breath when place near the mouth. Leaks are found by using a a 5% Hydrogen 95% Nitrogen tracer  gas mixture. The sniffer tip of the Hydrogen Leak Detector is placed along the piping. When a leak is present the Hydrogen Tracer Gas will escape and LOKtracer will react. When a leak is detected the Hydrogen Leak Detector will increase its beeping and amount of lights on the panel as more Hydrogen is detected. This process works even for buried or covered equipment as long as it is permeable to gas.

Product Information

Hydrogen Leak Detection
Sniffing Using 5% Hydrogen/95% Nitrogen Tracer

Using hydrogen/nitrogen as a tracer gas provides a significant cost advantage to helium sniffing, while providing a 1000x increase in leak detection sensitivity over bubble testing methods. The TLD.1000 Hydrogen Leak Detector provides a quantitative leak rate display in ppm with leak rate sensitivity to as low as 1 ppm. The TLD.500 Hydrogen Leak Detector is a cost effective option great for when leak location is the most important feature.

Hydrogen vs. Helium Leak Detection

Helium sniffing was the preferred method of tracer gas leak detection for many years. Equipment cost, helium gas cost and availability has limited the applications in which tracer gas could be used, leaving users to employ less sensitive technology methods. Helium leak detectors can be either mass spectrometer or thermal conductivity technology. Compared to hydrogen tracer mixture, helium mass spectrometers are 20x more costly than hydrogen, while helium thermal conductivity suffer from less sensitivity and more frequent service. Both helium methods pull a gas sample into the probe which can cause clogging of the probe. Our hydrogen leak detectors are "impact" detectors meaning no gas is drawn into the detector.

Hydrogen vs. Bubble Testing

Bubble testing is the accepted low cost method of finding leaks. Using soap and water solutions, bubbles are formed at the leak location. Alternate method is to submerge the test article in water and look for bubbles. Using a hydrogen mixture tracer gas provides at least a 1000x increase in sensitivity. Leaks that do not produce a bubble can be detected with either the TLD.500 or TLD.1000 Hydrogen Leak Detectors.

Hydrogen Leak Detector

TLD.1000 Hydrogen Leak Detector

Hydrogen Leak Detector

TLD.500 Hydrogen Leak Detector

Purchase a TLD.500 or TLD.1000 

Demonstrating the TLD.500

TLD.500 Finding Small Leaks

TLD.500 Leak Rate Capability

TLD.1000 Leak Rate Capability

Frequently Asked Questions Concerning Hydrogen Leak Detection

Q. Isn’t hydrogen dangerous and explosive?

A. In 100% concentration, that is the case. We always recommend using 5% hydrogen mixed with 95% nitrogen because hydrogen is not combustible in nitrogen until hydrogen represents 5.7% . This mixture is green label non-combustible, thus will not ever have the ability to combust or increase the intensity of a fire.

Q. Will the hydrogen in the mixture settle out and cause an unsafe condition?

A. No, it remains mixed at all times. All inert gases remain cannot stratify. If this was the case, the air we breathe would become pockets of nitrogen, helium, oxygen and other gases that make up air. In short, if this was a true principal, we would all be dead.

Q. What size leak can the TLD.500 and the TLD.1000 find?

A. The TLD.1000 shows a quantifiable H2 leak rate and and can detect into the single digit ppm values. The TLD.500 while not displaying a quantity of H2 (has a series of lights that indicate more quantity) our testing has indicated a  concentration detection into the 25-35 ppm range a leak rate of 0.25 oz/yr refrigerant gas is normal. The detection limit is actually smaller but the user cannot always distinguish that low of a signal as a leak.

Q. Which is better as a tracer gas, hydrogen or helium?

A. In the past, helium was the best tracer gas because of its availability, the equipment to detect it repeatedly and reliably and its low background in air (0.5 ppm). Hydrogen mixture as a tracer gas is now popular because instruments like the TLD.500 and TLD.1000 have improved in being able to find small leaks. Also, helium is in short supply and expensive. Hydrogen is a good choice also because of low background in air (0.05 ppm).

Q. What is the cost of the 5% hydrogen, 95% nitrogen tracer gas compared to helium?

A. 5%H2/95% N2 is 15-25% the cost of 100% helium. While there are efforts to lower the helium concentration to also lower the cost, that affects the sensitivity of the helium leak detector to find smaller leaks. Also, because the helium/nitrogen is now a mixed gas, there is a charge to mix it at the factory. So cost savings to less helium in the mixture may not significantly reduce its cost.

Q. Where have hydrogen leak detectors been used in the past?

A. Hydrogen leak detectors were used extensively in locating leaks during the telecom boom of the late 1990’s. Since then, hydrogen leak detectors have improved leading them to be used in applications where lower detection of leak rates is required. Future use of hydrogen leak detectors is predicted for detecting and locating leaks in underground water lines or pipes. Water is increasingly a strategic resource and leak detection is getting more important. Our TLD.500 starts in price at $998, allowing more plumbers and leak detection companies to be able to employ tracer gas leak detection into their portfolio of capabilities.

For Finding Leaks in Underground Piping    -    Hydo-Lok Sub-Surface Piping Hydrogen Leak Detector