GPL 750 Odorizer

Odorizer | Odorant Injection Odorization

The GPL 750 uses patented drip technology, providing precise odorization in low-flow (even no-flow) and intermittent-flow applications.

Eco-Friendly •  Low and Intermittent Flow Odorization

The GPL 750 is appropriate for municipalities, small city gate stations, and methane (biogas) producers. The PLC receives flow data and compensates the injection rate to allow uniform odorant distribution.

Batch Odorant Injection for Pipelines:
1 to 225 PSI (1 - 15.5 Bar) Standard
No Flow to 24 MMSCFD*
(*injection rate of 0.5 lb./MMSCFH)

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odorant injection systemThe GPL 750 utilizes patented drip technology to inject a fixed volume of mercaptan (odorant) into the gas stream, which ensures accurate and repeatable odorization at varying flow rates. It integrates Horner's most innovative controller to interface with the injector and all essential mechanisms to sustain continuous odorant injection relative to gas flow. The user can log into the controller remotely via computer, smartphone or tablet, to respond to alerts, change parameters or program the unit. Of course, onsite programming is a breeze with its programmable touchscreen.

industry leading controllerPLC with large, intuitive 7" color touchscreenFeatures

  • No odor operation
  • High rangeability
  • One moving part
  • Wireless modem
  • Interfaces with SCADA Systems
  • Remote communication using Modbus or wireless modem
    • Real-time mobile alerts
    • Online monitoring
  • Industry-leading PLC
    • Large, intuitive 7" color touchscreen
    • SD card data storage
  • No additional software required
  • Cl I Div 2, Groups C and D

750-turnkey001-angled-wHere is a portable turnkey odorant injection system, featuring the GPL 750 Odorizer, odorant tank, containment, GPL 100 Flow Meter and pipeline tap assembly (not visible), on a portable skid.


Advanced Technology - Remote Monitoring and Mobile Alerts

  • Real-time mobile alerts to smartphones and computers
  • The data stores on PLC SD Card
  • Automated remote monitoring using Modbus or wireless modem
  • Audit trail reports for regulatory or company inspections
  • No additional software required


Eco-Friendly - No Odorant or Gas Discharge

  • No gas or odorant discharges to atmosphere
  • No smell during operation and maintenance
  • Lowers false leak-call complaints
  • Saves pipeline gas


Cost-Effective and Simple

  • One moving part
  • Minimal fittings and tubing for long-lasting performance
  • No pneumatic pumps –minimum annual maintenance

Accurate and Reliable - Even in Problematic Flow Ranges

  • Precision odorant injection relative to the gas flow
  • Eliminates under- or over-odorization issues
  • Exceeds 49 CFR § 192.625 (e) Odorization of gas

class I Div 1 Electronics enclosure for the Cl I Div 1 750 Odorizer (optional)


  • No flow–750 MCFH gas systems
  • Up to 250 psi (17 bar)
  • High turndown ratio (high rangeability)
  • Class I Div. 2 (Class I Div. 1 optional)

Intrinsically safe GPL 750 odorant injection system on standPictured is CL I Div 1 750 odorization system stand-mountedOptions

  • GPL 100 Thermal Mass Flow Meter
  • Service maintenance package
  • Lease options available
  • Cl I Div 1 hazardous classification
  • Heater
  • Thermoelectric generator
  • Solar panel
  • Portability

 Upgrades to Systems

  • Turnkey odorization packages
  • Tanks and Containment
  • Fiberglass Buildings
  • Temporary Odorization Units


GPL 10000

The GPL 10000 is ideal for high-volume and high-pressure odorization from 10,000 to 10,000,000 SCFH.

Earlier Models

GPL Z9000.

Zeck Z9000

GPL 750 Odorizer | Odorant Injection System | Odorization