Bulk Solid Samplers for Representative Dry Material Sampling

Improve Sample Accuracy | Automate Quality Control | Increase Process Confidence

We help identify and implement the right Sentry bulk solid sampling solution for powders, pellets, granules, seeds, flakes, grains, and other dry bulk materials. From gravity chutes and hoppers to screw conveyors, drag conveyors, and pneumatic conveying systems, Sentry samplers deliver representative samples that improve quality control and process reliability.

Get a Bulk Solids Sampling Recommendation

Automatic and manual bulk solid samplers for powders, granules, pellets, grains, plastics, food ingredients, chemicals, minerals, cement, agriculture, and dry bulk material handling applications.

Sentry Model D2 Sampler

Sample across a gravity stream with a rotating slotted tube.

Discuss My Application Download Product PDF Technical Information

Sample across a gravity stream with a rotating slotted tube.

Is gravity-line headroom or one-sided access limiting your installation?

The Sentry D2 rotates a slotted tube to expose its aperture to the product flow. A motor-driven auger carries the sample to discharge. The low-height design is available in a same-side-discharge arrangement for restricted access.

Typical application
Review a gravity chute carrying powder, granules, or suitable kibble where material can segregate.

Also known as: Automatic strip sampler, slotted-tube sampler, D2 SSD sampler.

What this sampler can help you do

Address limited headroom

Review the low installation height against your chute and supporting structure.

Provide auger transfer

Move the collected sample toward discharge instead of relying only on gravity.

Work with one-sided access

Consider the D2 SSD configuration where the layout restricts the discharge side.

How the sampling cycle works

Rotate the sample tube

The actuator turns the slotted outer tube into the product flow.

Expose the aperture

Material enters along the tube’s sampling opening across the stream.

Convey to discharge

The motor-driven auger moves the collected material to the sample outlet.

Materials & industries to review

Food & pet-food ingredients

Powders, granules, pellets, or suitable kibble. Review the actual particle dimensions and formulation.

Cohesive dry powders

Discuss non-free-flowing material, adhesion, and cleanout before choosing an auger and aperture.

Industrial bulk products

Suitable chemical or mineral solids in gravity transfer. Confirm wear and contact-material requirements.

Sampling-method overview

Compare strip and cross-cut sampling approaches

Sentry’s official range video introduces the solid-and-powder sampling methods. Use it to frame the selection discussion; the D2’s slotted tube, auger, and SSD options are documented in its own literature. This is not a standalone D2 demonstration.

Watch on Sentry Equipment’s official YouTube channel

Review the sampling point and collection path

Start with a chute drawing showing the available height, both sides of the line, supports, and service access. For the SSD option, review the discharge route and removal space together. Include the largest particle, not only the average size.

Dimensional inspection of a Sentry bulk-solids sampler component — Sentry manufacturing: dimensional inspection of a bulk-solids sampler component. Photo: Sentry Equipment.

Document your material properties, process conditions, and required sample quantity with Sentry’s application worksheet.

Open Application Worksheet PDF

Configuration & selection

Sampling method: Strip sampling with a rotating slotted tube and auger transfer.
Process location: Gravity chutes and hoppers.
Published particle range: 10 µm to 6 mm with the standard tube. Larger-diameter augers can be discussed for larger particles.
Length & configuration: Insertion lengths start at 152 mm (6 in); standard D2 and same-side-discharge D2 SSD arrangements.
Process duty: The published standard specification identifies atmospheric service. Confirm drive, actuation, supports, and clearances.

Options to discuss with RTS

Standard or same-side-discharge configuration
Insertion length and mounting adapter
Larger-diameter auger for suitable larger particles
Food-grade contact arrangement
Release coating or QPQ hardening
Actuation, motor, air preparation, and controller

Send a line sketch, material description, particle-size range, bulk density, flow rate, pressure or vacuum, temperature, and cleaning requirements. Include the sample quantity, collection interval, and laboratory test you need to support.

Review My Sampling Requirements

Questions to settle before selection

Is a D2 strip sample the same as a full cross-cut sample?

No. A strip sampler collects along a strip through the stream. A full cross-cut method is a different sampling approach. If your specification calls for a full cross section or a particular standard, discuss that requirement with RTS before selecting the sampler.

How often should we take a sample?

Base the plan on the lot or batch, how the material varies over time, the test method, and the required composite quantity. Share the production pattern and analysis requirements so RTS can review the interval and collection arrangement with Sentry.

Can the sample be collected automatically?

Discuss sampler controls, the container location, and individual or composite collection. Confirm the controller and any indexing or collection equipment as part of the quotation; those accessories are not assumed to be included.

PDF Literature & Technical Resources

Use the literature to plan the discussion. Final materials, operating limits, controls, mounting, and installation drawings are confirmed for the selected application.

Compare the Sentry sampler range

Conveyor point sampling

Model A Sampler >>

Take repeatable point samples from a conveyor or gravity chute.

Example: Collect routine quality-control increments from a well-mixed dry ingredient stream.

Also known as: Automatic point sampler, conveyor sampler, sliding-gate sampler.

Free-flowing strip sampling

Model RX Sampler >>

Collect a strip sample across a free-flowing material stream.

Example: Review a flour, granular ingredient, grain, or seed stream where segregation could bias a point sample.

Also known as: Automatic strip sampler, retracting-tube sampler, pneumatic-line sampler.

Gravity-flow point sampling

Model RPG Sampler >>

Automate point sampling from a gravity chute or hopper.

Example: Take scheduled increments from a well-mixed granular ingredient leaving a hopper.

Also known as: Automatic point sampler, rotating-chamber sampler, gravity-chute sampler.

Retracting strip sampling with an auger

Model RB Sampler >>

Take a strip sample and convey it out with an auger.

Example: Review a powder stream where gravity transfer through a sample tube is unreliable.

Also known as: Automatic strip sampler, retracting auger sampler, bulk-powder sampler.

Low-height strip sampling

Model D2 Sampler >>

Sample across a gravity stream with a rotating slotted tube.

Example: Review a gravity chute carrying powder, granules, or suitable kibble where material can segregate.

Also known as: Automatic strip sampler, slotted-tube sampler, D2 SSD sampler.

Fixed-volume point sampling

ISOLOK SAK Sampler >>

Collect fixed-volume increments of powder, flakes, or granules.

Example: Build a composite sample from repeated increments of suitable salt, cement, fertilizer, or food product.

Also known as: ISOLOK automatic point sampler, fixed-volume sampler, plunger sampler.