281.491.2331 13839 West Bellfort Street Sugar Land, TX
281.491.2331 13839 West Bellfort Street Sugar Land, TX
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Crude Oil Composite Samplers

WELKER > Crude Oil Composite Samplers

inFlow™ (Fixed) Crude Oil Sampler

Because a quality sample counts no matter the size of your line, we’ve scaled the top features of our inFlow™ Crude Oil Sampler to fit 2”–4” pipelines. Direct-mount or with a pipe spool, the fixed insertion length of the inFlow™ reaches the center one-third to collect isokinetic samples of condensate, crude oil, or other liquid hydrocarbons. Sized for bypass sampling or small main lines, the inFlow™ is also well-suited for use downstream of separators and on Lease Automatic Custody Transfer (LACT) Units for truck and rail car loading and unloading.

inFlow™ Crude Oil Sampler

With a forty-year track record of accurate, reliable, and repeatable results, the Welker inFlow™ Crude Oil Sampler is the sample extractor for most main line sampling applications. Inserted into the center one-third of your conditioned pipeline, the inFlow™ collects isokinetic samples of condensate, crude oil, and other liquid hydrocarbons. With an adjustable insertion length, optional automatic insertion, and four collection heads to choose from, there’s an inFlow™ poised to take advantage of your process conditions.

inFlow™ ACE Crude Oil Sampler

When you transmit crude oil, you never know what you’ll have in your line. Variations in product characteristics and batch size and delivery make selecting the right sample extractor a challenge. Take the guesswork out of the equation with the Welker inFlow™ ACE Crude Oil Sampler. This patented main line isokinetic sample extractor covers all conditions you might encounter, whether you’re sampling condensate, crude oil, or other liquid hydrocarbons. With an adjustable insertion length and sample volume, fast sample speeds, shaft and seal protection, purge tube, and optional insertion tool, adapt the inFlow™ ACE to meet your changing needs and maintain sample integrity.

inLoop™ ACE

The ideal sampler for bypass sampling systems, the Welker inLoop™ ACE Crude Oil Sampler collects repeatable representative samples of light and medium crude oil and refined hydrocarbons.


Need a bypass sampler with a proven track record? Look no further than the Welker inLoop™ Crude Oil Sampler! On the market for nearly 30 years, the inLoop™ is a positive displacement pump designed for crude oil and light liquid sampling applications. Ideal for lines up to 1”, take quality sample grabs proportional to flow or time with the inLoop™ at the heart of your bypass sampling system.

Essentials™ Crude Oil Sampler

Sampling low volumes of low-pressure, low-viscosity crude oil? Welker has a low-cost, low-maintenance solution. The Essentials™ Crude Oil sampler is a probe-mounted volume regulator with a 3-way solenoid for remote operation. Avoid the inaccuracies and potential hazards of manual tank gauging by including the Essentials™ on your Lease Automatic Custody Transfer (LACT) Unit for truck and rail car loading or unloading.