H2Leak Product Reference Library
H2Leak.com · Info Library
Hydrogen Tracer Gas: The Full Reference
Eight guides pulled from H2Leak’s info section, in one place — the technology and safety FAQ, a wait-time reference for underground leaks, the business case for plumbing companies, GreenChill compliance, a tracer-gas method comparison, VRF-specific leak detection, a manager brief on test pressure vs. field leak rate, and a sensor-technology comparison.
FAQ: Frequently Asked Questions Regarding H2 Leak Detection
Covers how the semiconductor hydrogen sensor works and why it ignores water vapor, why a 5% hydrogen / 95% nitrogen mix can’t ignite, how the gas is sourced and what it costs versus helium, and how hydrogen behaves differently from helium as a tracer once it’s in use.
5.7% H₂ is the flammability threshold — the 5/95 mix stays well below itTime Period to Wait to Start Detection
A reference table for how long hydrogen tracer gas takes to migrate from a buried pipe up through dry sand, wet clay, asphalt, and concrete before it reaches a detector at the surface — plus how pipe depth, soil moisture, and injection pressure change the wait.
Loose soil at 2 ft: minutes. Wet clay at 1 m: up to 12 hours.Plumbing Companies ROI Adding Leak Detection
Makes the case for plumbing companies to stop referring leak-locating jobs to outside contractors. Walks through what gets given away under the referral model, a sample revenue breakdown for an in-house service, and a typical payback timeline on the equipment.
Typical starter rig breaks even in 5–7 jobsGreenChill: How H2Leak Can Help Companies With GreenChill Compliance
Aimed at supermarkets and cold-storage operators working toward GreenChill’s leak-rate tiers. Lays out what an undetected leak actually costs, includes a savings calculator for refrigerant loss, and covers the DXR-240 detector built for jobs that mix refrigerant and tracer-gas testing.
Platinum tier requires under 5% annual leak rateComparison of Leak Detection Tracer Gases & Technologies (Underground)
Puts hydrogen tracer gas, helium tracer gas, and acoustic detection side by side across sensitivity, pipe-material performance, equipment and operating cost, and application fit — from plastic water lines to deep buried pipe to low-pressure systems where acoustic tools struggle.
Hydrogen: lowest cost per leak investigation of the three methods comparedLeak Detection of a VRF Air Conditioning System
Why Variable Refrigerant Flow systems are harder to leak-check than standard splits — long piping runs, hundreds of joints, and runs hidden behind sheetrock — and why hydrogen sniffing can trace a leak through insulation and wall cavities where nitrogen pressure-decay testing falls short.
Detects leaks down to 1 gram/year of refrigerantPressure vs. Leak Rate Effects
Explains why a unit that passes its leak test at a low production test pressure can still leak once installed and running at real field operating pressure — walking through the molecular vs. viscous flow physics behind why leak rate doesn’t scale 1:1 with pressure, and why most HVAC/refrigeration leak paths fall on the worse, viscous-flow side of that relationship.
150 psi test → 350 psi field: viscous leaks run ~5.4× higher than the test showedComparison of Leak Detection Technologies
A field reference comparing the three sensor families used in sniffer leak detection — hydrogen tracer, thermal conductivity, and combustible-gas (heated diode / catalytic bead) — on what each senses, pre-charge requirements, sensitivity, sensor lifespan, and which HVAC, refrigeration, or MRI-adjacent job each is best matched to.
Combustible-gas sensors reading a 5% H₂/N₂ tracer lose ~20× sensitivity vs. a 100%-concentration reference