Natural Gas Odorization Systems. Built for Reliability. Backed by Welker.
OdorEyes by Welker delivers turnkey odorization systems matched to your flow, pressure, and site requirements. From system selection through startup and ongoing service, count on dependable equipment and a team ready to help.
Zero
Emissions · ECOsystem™
Redundant
Solenoids or Pumps
49 CFR 192.625
Built for Compliance
Welker Made™
Since 1954
Readily Detectable. Every Hour. Every Season.
Natural gas has no smell. Odorization is what lets the public detect a leak long before it becomes dangerous — and federal regulations require gas to be readily detectable at one-fifth of its lower explosive limit. That makes your odorizer one of the most important safety devices in your natural gas operations.
At Welker, we understand the responsibility behind every odorization system we build. Our solutions are engineered for reliable, consistent operation, helping operators protect communities, support public safety, and keep natural gas detectable through changing demands and conditions.
Proportional-to-Flow Accuracy
The controller watches gas flow continuously and corrects the injection rate automatically.
Verification, Not Assumption
Smart systems confirm odorization is actually taking place — and alarm if it isn't.
No Extra Software
Welker's program runs on an intuitive touchscreen controller, with Modbus for control-room monitoring.
Turnkey · Tested Before It Ships
Reliable Systems. Even More Reliable People.
Odorization can't take a day off, so neither do our standards. Redundancy is designed in — and when you call, you reach a team that knows your system.
Redundancy, Standard
ECOsystem™ models use redundant solenoids. Accu/Line™ models use redundant odorant pumps. Continuous operation is the default.
Self-Monitoring Controls
Real-time monitoring adjusts to flow changes and raises digital alerts, on-site or remotely.
Fewer Moving Parts
Pumpless designs remove the most common wear point, so there is simply less to fail and less to maintain.
Support That Picks Up
A dedicated Service department for installation, operation, and maintenance — from startup through the life of the system.
ECOsystem™ · Zero Emissions
Zero Emissions. Zero Pumps. Zero Hassle.
The ECOsystem™ conditions unodorized upstream gas and uses it as the blanket pressure for the odorant tank — so no gas is vented to atmosphere during normal operation.
Every serviceable component sits upstream of the odorant supply tank. In the rare event maintenance is needed, technicians never handle parts that have touched mercaptan.
No methane released during normal operation
High turndown for seasonal and demand swings
Low-wattage solenoids, minimal annual maintenance
Helps you reach emissions-reduction targets
One Family. A Fit for Every Flow.
Start with how you want to inject odorant, then match the system to your flow, power, and emissions goals.
Zero Emissions
Pumpless Vapor InjectionECOsystem™
All-in-one, proportional-to-flow odorizer for sites with regulated pressure differential. Ideal for low, high, and variable flow.
Zero Emissions
Pumpless Liquid InjectionECOsystem™ Liquid
The zero-emission ECOsystem™ design plus real-time liquid measurement — every injection measured to 0.002 cc.
Accu/Line™ Hi
Robust, consistent proportional-to-flow odorization with measured injection volume. Zero-emission design option available.
Accu/Line™ Lo
Sized for lower flow rates, with the same measured-injection accuracy as the Accu/Line™ family.
Accu/Line™ Solar
Accu/Line™ performance for remote sites without utility power.
View Accu/Line™ Solar →
Zero Emissions
Portable Odorizer
Odorization on the move for temporary supply, bypass, and maintenance events.
Three Questions to Your Starting Point
Answer three quick questions to see which OdorEyes system may be a good fit. It's a starting point for the conversation. From there, our team will review your flow, pressure, odorant, and site requirements to recommend the right solution.
How will this site operate?
How important is eliminating emissions?
What does your flow look like?
This is a starting point, not a final specification. Share your flow, pressure, odorant, and site details using our Gas Odorizer Worksheet, and our team will follow up to recommend the right solution for your application.
From First Call to Fifteen Years In
One team owns your system from sizing through service. No hand-offs, no finger-pointing.
Size & Specify
We review flow, pressure, odorant, power, and site conditions to recommend the right system.
Engineer & Build
Injection, controls, tank, and packaging are designed and manufactured by Welker.
Test & Start Up
Systems are tested before they ship, then commissioned with your team on site.
Support for Life
Training, troubleshooting, parts, and service from the people who built it.
Monitor It. Disperse It. Contain It.
OdorEyes accessories that round out a turnkey odorization program.
What Changes When You Go Pumpless
How the ECOsystem™ approach compares to a conventional pump-and-vent odorizer.
| Consideration | Welker ECOsystem™ | Conventional Odorizer |
|---|---|---|
| Emissions | No gas emitted to atmosphere during normal operation | Supply gas commonly vented |
| Moving Parts | No odorant pumps; low-wattage solenoids | Odorant pumps are a primary wear item |
| Maintenance Exposure | Serviceable parts upstream of the odorant tank — odor-free | Technicians may handle odorant-wetted parts |
| Redundancy | Redundant solenoids standard | Often optional or not offered |
| Controls | Touchscreen controller, no extra software, Modbus-ready | Varies; may require separate software |
| Support | One manufacturer from sizing to service | Responsibility can be split across vendors |
Applications We Odorize
From small laterals to transmission stations and renewable gas.
City Gate Stations
Municipalities
Transmission Pipelines
Distribution Pipelines
Compressor Stations
Power Plants
Peaking Facilities
LNG
RNG, Biogas, & Biomethane
Industrial Plants
Grain Dryers
Common Questions
What does "turnkey" inclulde?
The injection system, controller, odorant tank, and packaging, engineered together and tested by Welker before shipment — plus startup support and service after.
How does the ECOsystem™ achieve zero emissions?
It conditions unodorized upstream gas and meters it with solenoids to blanket the odorant tank, so no gas is emitted to atmosphere during normal operation.
Will my technicians handle odorant during maintenance?
Not with the ECOsystem™. All serviceable components are upstream of the odorant supply tank, so maintenance is odorant-free.
Vapor or liquid injection — which do I need?
It depends on your flow range, pressure differential, and verification needs. Use the System Finder above, then talk with our team to confirm.
Who do I call for service?
Welker Service handles installation, operation, and maintenance questions: 281.207.1879. For product and quote questions, call Sales: 281.491.2331.
Let's Find the Right System for Your Site.
Share your flow, pressure, and site details. We'll recommend a system and stand behind it.
