Sentry R Automatic Point Sampler

Part #
Sentry R

The Sentry R automatic point sampler automates sampling of free-flowing materials such as granules, powders, flakes or pellets from positive or negative pressure systems. A point sampler captures samples from a point in a process stream and often is used when the material is homogeneous.

To obtain a sample, the Sentry R sampler's air cylinder moves a sample probe and auger into the process stream. After the sample has been captured through the aperture and the sample tube retracts, the auger conveys the sample to the discharge point. The sample material is discharged through a flexible hose to a collection point. Sample volume can be changed at the sampler controller.

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

Suitable for: Pellets, powders, flakes, and granules


  • Retractable probe design isolates process pressure from sample container 
  • Sample tube and auger capture a fixed sample volume
  • Sample probe retracts from the line to avoid any restriction in the product flow between sample cycles
  • Rugged Stainless Steel construction
  • Optional sample tube materials for abrasive or non-free-flowing product 
  • Standard AC TEFC motor; DC and explosion-proof options available
  • Controllers and remote operating modules available in a variety of configurations
  • Available in a model that is conformant to ATEX Standards (through third party verification)
More Information
Materials 300 series stainless, Aluminum Cylinder, PTFE, UHMW-PE, White Nitrile
Particle Size 10 μm - ¼" (6 mm)
Process Temperature -10°F to 175°F (-23°C to 79°C)
Motor 1/6 HP TEFC Gearmotor, 90 RPM at 60 Hz
Input Power 115-230 Vac, 1ph, 60 Hz or 110-220 Vac, 1ph, 50 Hz
Maximum Process Pressure Up to 30 psig standard, up to 100 psig with special seal arrangement
Instrument Air Required 60 to 80 psi, 81 in³ per inch of stroke
The Beginner's Guide to Representative Sampling

Guide to Representative Sampling

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