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 A Sampler

Take repeatable point samples from a conveyor or gravity chute.

Discuss My Application Download Product PDF Technical Information

Take repeatable point samples from a conveyor or gravity chute.

Is the material well mixed at the sampling point?

The Sentry Model A uses an actuated sliding gate to release material from a screw conveyor, drag conveyor, or suitable sloped gravity chute. The sample moves to a collection point through a hose, without an auger conveying it to the container.

Typical application
Collect routine quality-control increments from a well-mixed dry ingredient stream.

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

What this sampler can help you do

Automate routine collection

Replace variable hand-scoop timing with a planned sampling cycle.

Keep the sample path simple

Material discharges without a conveying auger in the sample path.

Fit the conveyor arrangement

Review round, angular, U-trough, or drag-conveyor mounting with RTS.

How the sampling cycle works

Open the gate

An actuator opens the sliding gate at the selected location.

Collect an increment

Material enters the discharge tube while the gate is open.

Close and transfer

The gate closes and the collected material passes through the hose to the container.

Materials & industries to review

Food & feed ingredients

Free-flowing powders, granules, flakes, or pellets. Confirm that material is sufficiently homogeneous at the selected point.

Grain & seed handling

Review screw or drag-conveyor transfer locations, particle size, and the condition of the material.

Industrial bulk solids

Suitable dry chemical or mineral products. Check wear, moisture, flowability, and contact-material compatibility.

Exact-model demonstration

See the Model A sampling cycle

Sentry’s animation shows the Model A sliding-gate operating principle. Watch the gate and discharge sequence, then compare it with your conveyor geometry.

Watch on Sentry Equipment’s official YouTube channel

Review the sampling point and collection path

Review conveyor geometry, the material depth above the gate, and how the sample hose reaches the container. A gate that opens consistently is only one part of the plan: the material at that location also needs to reflect the product you intend to test.

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: Point sampling; best considered where the stream is homogeneous.
Process location: Screw and drag conveyors; suitable sloped gravity chutes can also be reviewed.
Published particle range: 10 µm to 6 mm for the standard arrangement. Review larger material before selection.
Discharge & materials: 38 or 76 mm discharge tube; 300 series stainless steel product-contact components.
Process duty: Published standard pressure duty is atmospheric. Confirm mounting, actuation, and utilities for the application.

Options to discuss with RTS

Discharge tube size and conveyor adapter
Pneumatic or electric actuation arrangements
Release coating for suitable adhering material
QPQ hardening for wear resistance
Pre-plumbed air filter, regulator, and solenoid valve
Collection hose, container, and sampler controls

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

Will a point sample represent a segregated conveyor bed?

It may not. The Model A takes material from one location. If composition, density, or particle size varies across the stream, RTS should review another location or a strip or cross-cut approach.

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.