GPL Odorizers manufactures environmentally-friendly odorant injection systems for natural gas and other gases. Unlike other systems, our odorizers are ventless, and they do not discharge gas into the atmosphere, making GPL Odorizers the most planet-friendly odorant injection system on the market. Our odorizers are self-contained, therefore, do not release gas, and this improves safety, saves pipeline gas, reduces odor, and subsequently, lowers leak call complaints.

Additionally, GPL Odorizers have fewer moving parts than the leading competitive odorization systems, which means less maintenance over the life of the unit.

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Our Odorization Systems

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GPL 750 odorant injection systemGPL 750

The GPL 750 provides accurate and optimal natural gas odorization in low volume (even no flow) and intermittent gas flow systems. The GPL 750 is for systems ranging from no flow to 750 MCFH and up to 250 PSIG. It is simple in design, eco-responsible, and SMART, offering remote data and control capabilities.

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odorization by GPL OdorizerGPL 10000


The GPL 10000 (formerly the Sentry Equipment and Zeck Systems Z10000) is the ideal odorant injection system for high-volume and high-pressure applications. The unit provides accurate odorization for gas with flow rates from 10,000K to 10,000,000 SCFH with excellent full-range accuracy (0.2%) for pipelines with pressure up to 1480 PSI.
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Natural Gas Odorant Injection Systems

System Upgrades

  • Turnkey odorant injection systems
  • Temporary odorization systems or pickling units

System Options

  • Fiberglass Buildings-Add an extra level of protection to house the entire natural gas odorant injection system. Read Fiberglass Buildings for Odorization Units.
  • GPL 100 Thermal Mass Flow Meter-The flow meter recommended for use with the GPL 750 has excellent low flow sensitivity and high rangeability. Read our case study, "Odorizer and Flow Meter Solve Low-Flow Odorization Challenges."
  • Tanks and Containment Skids-tank assemblies and containment skids for odorant injection systems
  • Cportable natural gas odorizerThe portable odorant injection system is designed for ease of installation and portability. ustom Solutions

    GPL Odorizers provides custom engineering and design to clients to meet the client's odorization needs. Pictured here is an example of a custom solution for a portable turnkey odorant injections system, which includes a built-in metal pallet permitting a forklift or pallet jack to transfer the system quickly. Read More.

    About Gas Odorization

    Natural gas (and propane) by itself is odorless and combustible. Having undetectable ignitable gases is unsafe and potentially disastrous. The impetus to add odor (odorize) to natural gas and other gases was triggered after non-odorized natural gas ignited in a Texas school, killing over 200 children in 1937. Today, federal regulations mandate the odorization of combustible gases so that gas can be smelled (49 CFR 192.625).

    Our Odorizer History

    For three generations, the Zeck family was the pioneer in the design and development of simple, yet accurate, natural gas odorization systems. In 2003, Zeck Systems introduced the Z9000 as a simplified and efficient approach to self-contained odorant injection systems with few moving parts. In 2010, Sentry Equipment Corp acquired Zeck Systems. GPL Odorizers acquired the assets of the Sentry Equipment's odorization product line in 2015.

    GPL Odorizers' Representatives

    Linc Energy Systems is the master distributor for GPL Odorizers. To learn who represents GPL in your area, call Linc Energy Systems at (303) 697-6701.