Sampler captures dry, wet or sticky materials

An automatic, rotary-arm, scoop-type sampling system from Bristol Equipment Company draws samples of bulk material from belt conveyors and deposits the samples into a receptacle standing by the belt

The Bristol third-generation DS-3B sampler, with standard 3-inch wide scoop, reaches into material on the conveyor and captures up to 16 cubic inches of sample per cycle in particulate sizes up to 1-1/2 inches in diameter.

Other scoop sizes are optionally available.

Automatic sampling cycles are user-adjustable from every 10 seconds to every 1700 hours.

The unit can be positioned almost anywhere along the conveyor, moving at up to 615 FPM, including inclined conveyors with up to an 18 degree slope.

On command from a signal initiated either from the sampler control or by remote automation, the scoop arm makes a single revolution in the direction of belt travel, at a speed adjusted to slightly exceed belt speed.

The arm rotates around an axis that is perpendicular to the belt, but angled 45 degrees to the horizontal.

Sample material is held in the scoop by centrifugal force until released near the top of the scoop-arm rotational arc, where the scoop stops abruptly, flinging the sample into a stainless steel hopper.

Quick arm rotation and abrupt stop result from a worm-gear reduction drive powered by a 3/4 HP brake-motor.

The point at which the arm stops to discharge the sample is user-adjustable for optimal release of different materials.

Scoop and hopper are made of 12-gauge, type 18-8 stainless steel to resist wear and rust contamination of the sample.

The leading edge of the scoop is weld-hardfaced for long life.

The entire sampling system is contained within a rugged, 10-gauge, welded-steel cabinet with all surfaces protected by a polyurethane enamel coating.

It mounts on its own steel support bridge, spanning over the conveyor support frame.

To guard against accidents, the above-belt area swept by scoop-arm movement stays within the cabinet.

Drive components are housed in a sealed compartment that excludes abrasive dust and water.

The cabinet measures 50 inches long, 48 inches wide and less than 24 inches high, including dual top-mounted hinged covers over maintenance hatches.

The unit requires 230 or 460 volt, 3-phase, 60 Hz service for the motor.

Controls, powered from the same source through an on-board 115V stepdown transformer for safety and minimum maintenance, are mounted externally in a NEMA IV enclosure for protection from dust and weather.

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