The Wrights Dowson Group has an established reputation for designing and manufacturing high-quality powder samplers alongside its other products, including screw conveyors, carousels and industrial components.

A powder sampler is used to ensure quality assurance, particularly in the food and chemical industries. Powder samplers are how manufacturers take samples and then check them for consistency, composition, quality and contamination.

Samples are taken over a given period using the powder sampler into a sample jar. When full, it is then moved to a collection point and replaced with an empty sample jar in preparation for a new powder collection.

The powder samplers produced by the Wrights Dowson Group have different properties according to their design, although their construction is often made from the same or similar materials:

1. Powder samplers are available in several standard configurations according to our client’s needs and specific industries. They are produced as bespoke items according to customer and site requirements. In addition, we can design and manufacture manual or automated powder samplers.

In the case of automatic powder samplers, these are often split into three different categories, depending upon what their sample extraction mechanism is:

  • Suction and vacuum: where the sampler uses these methods to sample the powder
  • Gravity: where the sampler captures the powder samples using gravity force
  • Pneumatic or pressure: The powder sampler uses pressure within the chute or pipe to extract a sample.

In the case of manual powder samplers used to sample immobile powder in a sack or bin, the design consists of a tube or tubes with a sharp tip. This is thrust into the container. The powder then fills the sample pocket, and the manual sampler is removed. Sometimes this type of powder sampler is also called a sampling thief.

For a fast quotation or more technical information about the essential properties of powder samplers, please contact us.

2. One type of powder sampler manufactured by the Wrights Dowson Group is a PS Powder Sampler. It is used to sample powders as fine as microscopic powders such as flour, cement or corn starch to larger pellets and granules and can be mounted on vertical or horizontal lines.

The standard construction properties include Teflon seals, Stainless Steel sample tubes, contact parts and machined and polished auger, and Aluminium seal housing.

3. The GRA/GRE Powder Sampler designed by the Wrights Dowson Group is also made of Stainless Steel construction and is used to sample free-flowing powders of different consistencies. This type of sampler is suitable for use in sloped or vertical chutes. The GRA model includes a pneumatically controlled sample cutter with adjustable cutter speed controls, while the GRE model has a motorised sample cutter, where the speed control is optional.

Our Powder Sampler designs can also include hinged, Plexiglass doors and a security lock.

4. The aforementioned sample jars used by the Powder Samplers are available in either Stainless Steel or High-Density Polyethylene (HDPE). They can be manufactured in a range of sizes according to the types of powders being sampled. In addition, sample bags can be substituted for sample jars.

5. Powder Samplers can be designed and manufactured by the Wrights Dowson Group to operate manually or automatically. They are designed for easy maintenance and cleaning. The PT Powder Sampler is one example of this. Its design allows for powder collection to occur when the powder sampler is mounted on pneumatic conveying systems or gravity chutes that are horizontal, vertical, positive or negative.

6. Many powder sampler designs can be fitted to existing equipment and connect to different machinery types, including sieves, packing and charging stations, mills and pipework. Once the sample has been extracted, it passes down a chute or pipe and is collected for quality control.

7. The mid-belt powder sampler design allows manufacturers to collate samples from a moving conveyor belt and at preset times. Its design can sample-heavy materials, including ores, wood chips, minerals, coal, limestone and aggregates. It can, however, also be used to work with more refined powers. In addition, it has a direct motor drive and does not need chains, belts or other auxiliary equipment, making it a low maintenance and low-cost option.