GPL 10000 Odorant Injector

GPL odorant injection system

The GPL 10000 is for high-pressure and high-flow applications at transmission companies and large city gate stations.


Continuous Odorant Injection

The odorizer has high rangeability, achieving accurate odorization over a wide operating range. The system delivers constant odorant injection proportional to the gas flow rate through an industry-leading PLC interfacing with the flow meter and other system components.

Continuous Odorant Injection for Pipelines:
Up to 1480 PSI (102 Bar)
From 0.48 MMSCFD to 240 MMSCFD*
(*injection rate of 0.5 lb./MMSCFH)

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manifold of advanced odorization systemNEW solid-state manifold permits easy, hot-swap capability, minimizes joints and fittings making it more reliable and longer lasting.

  • 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
  • Class I Division 2, Groups C and D


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

Advanced Technology - Remote Monitoring and Mobile Alerts

  • Real-time mobile alerts to smartphones and computers
  • 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

Accurate and Reliable - Even in Problematic Flow Ranges

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

Cost-Effective and Simple

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



194 lb. (88 kg)

Typical: 24 VDC; 0.036 HP; 27.05W
Maximum: 24 VDC; 0.193 HP; 124.8W
Optional: Optional AC and solar

Gas Pipeline Pressure
To 1480 psi (102 bar) maximum

Odorant Blanket Pressure
15 to 30 psig (1 to 2 bar)

Data Logging
Hourly archives with audit trail

304 stainless steel

Odorant Injection Rate, Continuous1
.50–50 cc/min. (.008–.793 gal/hr.) at a natural gas flow rate of .107–10.7 MMSCFH (3029–302990 Sm³/h)

Odorant Injection Rate, Batch
For natural gas flow rates below 100,000 SCFH down to virtually zero flow


  • Myers hub: (3) 3/4 in NPT; (2) 1/2 in NPT
  • Odorant outlet, odorant return, vent, odorant inlet: 1/4 in comp

Operating Temperature Range

  • 0–140˚F (-18–60°C)
  • Optional: Heater assembly available for below 0°F (-18°C)

Hazardous Area Classification
Class I Division 2, Groups C and D

User Interface Options:

  • Optional HMI via a serial interface (max. 20 ft. from the unit)
  • 10000-configured TechView via Ethernet or Internet (supplied at no charge)
  • Serial RS-485 Modbus; Open/TCP Modbus via cell modem

Additional Options:
Wireless modem, battery pack, solar panel, odorant tanks, and containment

1 At injection rate of 0.5# mercaptan/MMSCF (10 mg/m³)

It is the end user's responsibility through its analysis and testing to select products and materials suitable for their specific application requirements, ensure they are correctly installed, safely applied, properly maintained, and limit their use to their intended purpose. Improper selection, installation, or use may result in personal injury or property damage.

Tank Cntnmnt-System longOptions

  • Service maintenance package
  • Thermoelectric generator
  • Odorant pressure control
  • Portability

Upgrades to Systems

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

Earlier Models


Sentry Equipment Odorant Injection Products

Zeck Systems Odorization

What makes GPL 10000 Unique?

odorant injection system enclosureWhat makes the GPL 10000 unique is its dual stroke electrohydraulic pump. A variable speed electric servo motor drives a stochastic mechanism that converts the rotary motion of the motor into linear double stroke motion. This provides the force to drive two independent metal Bellows Pump modules. The dual stroke sends the hydraulic fluid into one of the pump modules, compressing the bellows to discharge a fixed volume of the odorant. Simultaneously, hydraulic fluid is withdrawn from the opposite pump module, expanding that bellows and drawing in new odorant for the next injection stroke. This action provides nearly continuous injection flow, a feature not offered by single pump injectors. As the pipeline flow rate varies, the pump motor speed is adjusted to change the time per stroke while maintaining a continuous flow of odorant in the process. Since the motor has the maximum rate of 25 revolutions per minute, fluid flashing, due to acceleration induced pressure drop, is virtually eliminated.

Additionally, the hydraulic section of the Bellows Pump is completely isolated from the odorant section, and there are no seals or diaphragms to replace in the odorant section of the pumping circuit. The only replacement items are the hydraulic piston seals that have been engineered for high cycle life. When piston seal replacement is required, the drive system is easily isolated from the pump modules by closing the isolation ball valve located on each hydraulic line. The piston seals are captured within cartridge assemblies to allow for quick and easy replacement. The GPL 10000 odorizer is state of the art technology for accurate, repeatable and low maintenance odorant injection.

Odorize Gas - GPL Odorizers 10000 Odorant Injection System