H2Leak.com · Info Library
Hydrogen Tracer Gas: The Full Reference
Fourteen 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, a sensor-technology comparison, a plumber training module on pinpointing underground water leaks, a municipal training module on locating water main leaks with the smallest possible dig, an equipment comparison against the Dielectric multi-gas leak detector, a guide to coil-manufacturing rework leak location with hydrogen, the business case for switching from helium to hydrogen leak detection, and a hydrogen leak detector basics primer.
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 referencePlumber Training Module: Pinpointing Underground Water Leaks
A free field-training module for plumbers. Lays out an eight-step workflow (confirm, isolate, locate the pipe, pinpoint, verify before digging), then covers ground microphones, correlators, hydrogen tracer gas, thermal imaging, GPR, pressure testing, and pipe locating — with a condition-by-condition comparison table, six field scenarios, common mistakes, a knowledge check, and a glossary.
Hydrogen tracer kit: $2,950 vs. $10,000–$35,000+ for a correlatorMunicipal Training Module: Locating Leaks in Water Mains & Service Lines
A free training module for city and utility leak detection technicians. Works from system-wide surveys down to the pinpoint — satellite, DMA night-flow, noise loggers, listening surveys, correlators, in-pipe tools, and hydrogen tracer gas — then breaks down the full cost of a street or slab excavation, with a cost calculator and a guide to matching dig size to pinpoint confidence so crews damage less roadway and concrete.
Utility cuts cut arterial pavement life from 25 to 16.5 years (Los Angeles study)Dielectric Multi-Gas Leak Detector Comparison to Hydrogen Leak Detectors
Puts the Dielectric Multi-Gas Leak Detector — a long-standing instrument for pressurized cable, tank, and underground piping work — side by side with H2Leak’s Hydro-Lok™ (hydrogen) and TG-240D (helium / multi-gas). Compares unit price, tracer gas, sensitivity, consumables, calibration, warranty, and charging, then covers tracer-gas operating cost, moisture-trap cartridges, factory recalibration, and other hidden service costs.
Hydro-Lok™ + TG-240D together: $6,245 vs. ≈ $9,406 for one Dielectric unitCoil Manufacturing: Rework Leak Location Using Hydrogen Leak Detection
For coil plants that run helium vacuum-chamber leak tests. Explains how helium released during rework — from failed coils, disconnected supply lines, and sniffing — builds up in plant air until background levels exceed spec and testing has to stop. Shows how switching rework to 5% H₂ / 95% N₂ with the DXH-240 breaks that loop, with a step-by-step rework workflow, specifications, and best practices for thresholds and purging.
Air already holds ~5 ppm helium — rework with hydrogen keeps it out of the chamber backgroundBenefits From Switching From Helium Leak Detection to Hydrogen Leak Detection
For HVAC, refrigeration, automotive A/C, and underground leak detection teams still using helium. Covers why 5% H₂ / 95% N₂ finds the same leaks for far less, the current helium supply squeeze, a helium-vs-hydrogen comparison table, which H2Leak detector fits each job, a payback calculator, a four-step switch-over plan, and an FAQ.
Helium cylinder ~$450 vs. hydrogen/nitrogen ~$85 — $365 saved per cylinderHydrogen Leak Detector Basics
A starting-point guide to hydrogen tracer gas leak detection. Explains how tracer detectors differ from hydrogen safety monitors, how a 5% H₂ / 95% N₂ charge escapes and is sensed, and why hydrogen beats soap bubbles and refrigerant sniffers. Covers applications from HVAC and automotive A/C to buried pipe and pools, which H2Leak detector fits each job, a step-by-step test procedure, safety rules, and an FAQ.
Hydrogen tracer finds leaks to 1×10⁻⁵ cc/s (~0.10 oz/yr) — ~10× finer than a refrigerant sniffer