Sentry DS-3 Automatic Point Sampler

Part #
Model DS-3

The Sentry DS-3 sampler is a heavy-duty point sampler that automates sampling of materials such as grains from conveyors. The DS-3 unit mounts at any convenient point along the conveyor, using heavy, bridge-type supports (included). Controls and discharge can be assembled to accommodate access from the right or the left side of the conveyor.

The Sentry DS-3 sampler mounts using heavy, bridge-type supports. The sampler controller and discharge can be assembled to accommodate access from the right or left side of the conveyor. Arm speed is adjustable to suit belt speeds up to 900 FPM. The arm moves at a slightly faster speed in the same direction as the conveyor belt, collecting a sample without disrupting material.

The arm drive system is a rugged worm gear reducer in combination with a variable speed motor drive, which produces a wide range of flexibility in matching arm speed to the speed of the conveyor belt. Cycle rates are adjustable to sample at a maximum frequency of twice per minute.


  • Provides a contemporary sample from a moving conveyor belt via conical sweeping motion in the direction of product flow
  • Various sample volumes available
  • Hinged inspection doors interlock to prevent arm rotation if open
  • Controllers and remote operating modules available in a variety of configurations 
  • Heavy-duter frame and drive components
  • Precycle warning signals for operator safety
  • NEMA 4 enclosure for sampler controller for dust and weather protection
More Information
Materials 300 series stainless, Carbon Steel, Neoprene
Particle Size 2 in (50 mm)
Motor 3/4 HP Brakemotor
Input Power 230/460 Vac, 3ph, 50/60 Hz
Maximum Process Pressure ATM

Solid & Powder

Our solid and powder sampling equipment accurately samples pellets, powders, granules, seeds, and more. Choose from various products, including Sentry ISOLOK automatic samplers and robust cross-cut samplers. Sentry products are manufactured precisely to ensure maximum stability, accuracy, durability, and reliability.

Options for solid & powder samplers include the Sentry RS Automatic Strip Sampler. This automated sampler is compact and low maintenance with a stainless-steel design. Another option for solid and powder samplers is the RPG Automatic Point Sampler. This product suits sampling systems that test powders, flakes, granules, and friable materials. This product features a sample cavity that captures fixed volumes and remote operating modules available for various applications. See these products and more by scrolling down to our complete product list. Sentry Equipment is a world leader in sampling device manufacturing. Our employee-owned team created custom sampling solutions specifically for your market. Our engineers design comprehensive solids and powder sampling equipment to improve its overall process, efficiency, and precision.

Whether you need a strip sampler for your flour milling applications or a cross-cut sampler for your cement applications, you’ll find the product to meet your needs in our solid and powder sampling equipment selection.

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