Sentry Variable Check Automatic Sampler

Part #

The Sentry Variable Check sampler is a point sampler that traverses a solid product flow stream to capture product and moves the product out of the process by means of a center-less auger, keeping the product intact. A large, customizable aperture in the sampling tube allows accurate sampling from lines that produce product of different sizes or at different flow rates.

The sampler provides repeatable, statistically representative samples for the most demanding quality processes and pathogen testing. Operation and maintenance is made easy through accessible cleaning and repair from one access point in the process line.

Pairing with a Sentry SBC Controller or other PLC based system allows companies to program multiple product samples from process lines. Variables such as product size, aperture opening, auger speed and transverse time can be changed in a recipe format for different product runs.


With representative sampling, characteristics of each sample match that of the entire lot or batch - so samples are repeatable, leading to accurate data analysis. Automatic sampling ensures a sample can be easily and safely obtained with no need for direct human interference. This ensures sample integrity and operator safety.

  • Same side discharge for ease of installation and maintenance
  • Close tolerance between the auger and tube assures self-cleaning to help prevent cross-contamination
  • Larger diameter augers available for larger particle sizes
  • Insertion lengths starting from 6 inches (152 mm)
  • Product contact materials are 300 series stainless steel; food grade configuration available
  • CE compliant models available
  • Optional non-stick release coating
  • Explosion proof (XP) motor available
  • Custom mounting adapters for round, square or other shaped chutes or pipes
  • Center-less auger moves product without damage
  • Customizable aperture for sampling products of different sizes
More Information
Materials 300 series stainless, Acetal, Aluminum Actuator, White Nitrile
Process Temperature -20°F to 180°F (-29°C to 82°C)

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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