In the late ‘70s, our company recognized that drawing process samples in open containers invited contamination and inaccuracy, and also posed serious health and environmental risks. Our response: the Dopak® sampling system, which quickly became the international standard for performance and quality in cost-effective closed loop and closed vent sampling systems for liquids, gases, liquefied gases and solids.

Today’s Dopak® samplers are highly refined, state-of-the-art systems. They enjoy broad acceptance in the chemical and petrochemical industries. Demand is also growing in the pharmaceutical and biotechnology fields as we continue to develop new products for these applications.

We are innovators, but our innovation is firmly grounded in experience, beginning in 1926 with the instrument and equipment manufacturing of Dovianus. The spectacular growth of Dopak® samplers in the late 1970s spurred Dovianus to divest its other businesses so it could concentrate on customer-oriented development, manufacturing, marketing and support of Dopak® samplers. We are experts in sampling standards worldwide. In 1981 we established Dopak® Inc. in the United States to give our many North American customers local access to our sampling system expertise.

This information highlights the development, engineering, manufacturing and support skills that stand behind every Dopak® liquid sampler, gas sampler, liquefied gas sampler and solid sampler.
When you discover what Dopak® is, we’re confident you’ll make Dopak® your preferred source for sampling systems. 

Dopak® is global reach, local support

Highly specialized products require expert support. Our worldwide network of professionals work to meet the needs of local customers, supported by sampling experts at our world headquarters at Dovianus BV in Bergschenhoek, The Netherlands. Our American customers are supported by Dopak® Inc. from offices in Houston, Texas. These support teams offer customers around the world a fast, accurate response to their needs.

Our representatives use the latest automation technology for design, manufacturing and sales support to give your orders and information requests prompt and efficient attention. You benefit from a centralized base of sampling expertise, plus the local representative, familiar with the challenges you face in your specific market.

Wherever you are, rely on us for fast, thorough advice and support on a sampling system that fits your needs.

Dopak® is dedication to better, safer samplers

Dopak® designs and manufacturers process samplers exclusively. Our engineers are sampler specialists who understand sampling safety issues and build an intrinsic level of safety into all of their designs, giving Dopak® an unexcelled safety record.

That same engineering expertise lets us meet your sampling requirements, efficiently and cost-effectively, no matter how simple or complex. If you have special technical and safety requirements, we can adapt one of our off-the-shelf products as a cost-effective solution.

For highly complex sampling, our engineers will design a system to your precise specifications. Satisfied Dopak® users in the petrochemical and chemical industries are proof that our custom products satisfy the toughest requirements.

Dopak® meets and exceeds safety standards worldwide

Decades of craftsmanship in instrumentation shows in every sampler. Dopak® engineers have designed thousands of standard sampling systems for most sampling needs, which we produce in economical volumes at our in-house manufacturing facility.

Whether you choose a standard product or a customized system, you can be sure Dopak® samplers will meet the most stringent environmental, health and safety standards.

Dopak® is professional equipment, expert operators

Visit our production department and you will find the very latest in manufacturing and control equipment, including an array of CNC machining centers and lathes turning out standard components for virtually every Dopak® sampler at high rates of speed and efficiency, We are also fully equipped with tools and machines to modify standard designs and custom manufacture special designs. Dopak® can also offer certified welding.

We are continually upgrading our manufacturing program for faster processing and optimum stock control to meet growing demand. One thing, however, does not change: our commitment to quality, guarded by a manufacturing staff that holds itself to the highest standards of craftsmanship.

Dopak® samplers, the hallmark of accuracy and safety

Dopak® is tangible quality
Quality is the final test of a product’s worth. Our customers know from experience that Dopak® samplers meet or surpass the world’s most rigorous quality standards. To demonstrate our quality objectively, we have introduced a quality program and have achieved certification under the tough ISO 9001 standard for our factory.

All Dopak® samplers are subjected to measurements and quality checks throughout the production process. As a final check, we also carefully inspect each finished sampler, then test selected units. We give the critical components identifying numbers, allowing us to trace them throughout their usable life.

You can rely on consistent quality from sampler to sampler, whether you buy off-the-shelf models or order a custom-made unit. We manufacture common components in advance, under strict quality assurance measures and keep them in an up-to-date inventory system. This enables us to build standard or modified samplers and even large quantity custom-made Dopak® sampling systems on short notice without sacrificing quality.