281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
ISO 9001:2015
U.S. Patents
90 + U.S. Patents
Since 1954
Get A Quote

Essentials™ Gas Sampler

Economical Gas Sampling System

Low cost doesn’t have to mean low quality. The Welker Essentials™ Gas Sampling System gives you the representative composite samples you need at the price point you want. The probe-mounted self-purging system collects fresh samples proportional to flow or time. Durable and low maintenance, the Essentials™ is well-suited for remote locations. Connect a controller signal to the 4-way solenoid for remote operation—the only thing missing is the sample cylinder!

The Essentials™ is ideal for clean, dry single-phase natural gas.

Complies WithGPA 2166, API 14.1, ASTM D5287, IS0 10715
Essentials Gas Sampler
Essentials Gas Sampler
In the Short Run

Eliminate Lag Time

Mounted on a Welker Sample Probe, the Essentials™ installs directly to the pipeline. There are no long tubing runs to impact sample timeliness and representativeness. Extending into the center one-third of your pipeline, the Essentials™ captures samples representative of the flowing stream and leaves free liquids behind.

Fresh off the Pipeline

Collect Representative Samples

The Essentials™ features Welker’s Fresh Sample System™. This self-purging design ensures a fresh, representative sample grab during each sample cycle.

Fresh Sample System
Easy Maintenance
Without Interruption

Easy Maintenance

There’s no need to depressurize your pipeline and remove the Essentials™ for standard maintenance. To safely remove the sample pump, simply close the valves on the Sample Probe to isolate it from process pressure.

Point of No Return

Backflow Protection

The inline relief protects sample representativeness during fluctuations in pipeline pressure. Acting as a check valve, the inline relief keeps your samples in the sample cylinder. If pipeline pressure drops, rest assured sample won’t flow from your cylinder back to the pipeline.

Backflow Protection
Good Things Come in Small Packages

Corrosion-Resistant Enclosure

 The Essentials™ can withstand a wide range of aggressive environments. The rain-tight, watertight, corrosion-resistant enclosure with integrated padlock hasp makes it ideal for remote locations. The clear cover allows for easy on-site monitoring of regulator pressure.

Timing is Everything

Optional Timing System

No external power supply? No problem! The long-lasting lithium battery pack of the optional Welker 6Tc Timer/Controller can power the Essentials™. Set the 6Tc for proportional to flow or time-based sampling. This UL listed intrinsically safe controller is designed for hazardous areas.

MPS-2: Timer Board


Essentials Gas Sampler
 Essentials Gas Sampler
Materials of Construction316/316L Stainless Steel Wetted Parts With Anodized Aluminum Non-Wetted Parts
Seal MaterialViton® and Teflon®
Pipeline Connection 1/4" MNPT
Relief TypeInline Relief
Sample Volume0.25 cc
Operating Pressure2,160 psig MAOP @ -20 °F to 120 °F

Standard Options

Essentials Gas Sampler


Outlet Options:


Outlet Manifold & Purge Bypass
Cylinder Holder


Mounting Requirements


3/4" MNPT Probe Mount with Enclosure

Probe Length



Plus Welker

For custom options, choose Plus Welker™.

Customer inspired. Welker Manufactured.
Collaborate with us to create a custom product unique to your application.