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Hydrogen Tracer Gas Leak Detection for HVAC & Refrigeration Repair

Product Information

The Most Accurate Method for Locating Leaks in Commercial, Residential, and Industrial Systems

Refrigerant leaks are one of the most common and costly issues in HVAC and refrigeration systems. Traditional methods—such as UV dye, soap bubbles, or electronic refrigerant sniffers—often struggle to locate small or hidden leaks. Hydrogen tracer gas leak detection provides a fast, reliable, and highly precise solution for detecting leaks in air conditioning, heat pumps, chillers, and commercial refrigeration equipment.

This advanced method is becoming the preferred diagnostic tool for HVAC technicians and refrigeration service professionals who want higher accuracy and fewer callbacks.

With our DHR-240 Hydrogen & Refrigerant Leak Detectors, HVAC Techs have the best of both worlds. When rolling up to a job, the DHR-240 provides the option to perform a high sensitivity leak check with refrigerant in the system. If refrigerant is not in the system, tracer gas 5% Hydrogen/ 95% Nitrogen can be placed in the system and the very same DHR-240 with no adjustment can then detect Hydrogen in the mixture to indicate the leak location…… Professional equipment for high level HVAC and Refrigeration leak professionals.

Our Observation

For the customer….Hydrogen leak detectors can smaller leaks than a refrigerant leak detector. By nature, the hydrogen in the 5/95 mixture is high energy and does not pool in a flume or “hang around” as it is lighter than air and moves to space rapidly. Refrigerant gas is heavier than air and can form a plume in the area of the leak. This plume makes it more difficult to identify the correct leak location. So areas that could be identified as a leak could be an adjacent area. This brings in uncertainty which joint is actually leaking. Not repairing the proper leaking joint can cause another expensive service call.

For the HVAC technician….Using the 5%H2/95%N2 tracer gas allows the technician to reclaim refrigerant and then charge with the 5/95 tracer gas. The H2 leak detector can find smaller leaks that could be causing the issue. Not having to reclaim the refrigerant, find the leak then repair and test can be much more cumbersome and time consuming than using the 5/95 tracer gas then locating, repairing and then testing before introducing the reclaimed refrigerant gas back into the system. The 5/95 can be safely released into air or atmosphere when leak testing is completed.

H2 Leak Detection…Just a better experience for customers and HVAC Technicians.

Why Hydrogen Tracer Gas for HVAC & Refrigeration Leak Detection?

Hydrogen tracer gas (typically a safe 95% nitrogen / 5% hydrogen blend) is extremely effective for leak testing because hydrogen molecules are small, fast-moving, and easy to detect with sensitive instruments.

Advantages of hydrogen tracer gas include:

  • Detects micro-leaks that other methods miss

  • Safe, non-flammable mixture suitable for all HVAC and refrigeration systems

  • Environmentally friendly compared to testing with refrigerant

  • Highly sensitive detection for quick, accurate location of leaks

  • Ideal for both high- and low-pressure systems

Because hydrogen rises and diffuses quickly, it escapes through the smallest openings, allowing technicians to pinpoint the exact leak source—even in complex or concealed components.

Applications in HVAC & Refrigeration Leak Detection

1. Residential and Commercial HVAC Systems

Hydrogen tracer gas accurately identifies leaks in:

  • Central air conditioners

  • Heat pumps

  • Mini-splits and multi-split systems

  • Ductless A/C systems

It is especially effective in locating leaks inside walls, ceilings, or areas that acoustic and electronic sniffers cannot reach.

2. Commercial Refrigeration Equipment

Refrigeration systems used in supermarkets, restaurants, cold rooms, and food processing facilities rely on precise leak detection to maintain product safety and system performance.

Hydrogen tracer gas helps find leaks in:

  • Evaporator coils

  • Condensers

  • Brazed joints

  • Copper and aluminum tubing

  • Expansion valves and fittings

  • Refrigerated display cases

3. Industrial Refrigeration and Process Cooling

Large industrial systems often operate at high capacity and contain significant refrigerant volumes. Hydrogen tracer gas offers unmatched sensitivity for detecting leaks early, reducing downtime and preventing costly refrigerant loss.

4. Commissioning and System Integrity Testing

Hydrogen tracer gas is widely used during:

  • New installations

  • Retrofits

  • Repairs

  • Preventative maintenance

Technicians can confirm system tightness before charging with refrigerant—saving time and avoiding repeat service calls.

Benefits for HVAC & Refrigeration Professionals

  • Seal verification before charging refrigerant

  • Faster diagnostics and reduced labor time

  • Lower refrigerant costs and environmental impact

  • Reduced downtime for commercial and industrial clients

  • Fewer callbacks due to precise leak localization

  • Improved system performance and longevity

With the growing regulatory focus on reducing refrigerant emissions and protecting the environment, hydrogen tracer gas detection provides a powerful, sustainable solution.

The Most Reliable Solution for HVAC & Refrigeration Leak Detection

Hydrogen tracer gas leak detection delivers the accuracy that today’s HVAC and refrigeration professionals need. Whether you’re repairing a residential air conditioner, diagnosing a supermarket refrigeration system, or maintaining industrial cooling equipment, this method provides fast, pinpoint accuracy—helping you resolve issues the first time.