The openings of Spiral Grain Probes on the inside tube rotate around so that it opens first at the bottom and then in gradual steps to the top.

This assures a fair proportion of grain samples from the bottom levels as well as from the top. The Spiral Probe is highly recommended for sampling grains when foreign material is apt to be heaviest near the bottom of a truck. The construction of the probe is a double-tube brass with a 1 3/8″ outside diameter and heavy bronze point.

Weight 10 lbs
Dimensions 72 × 3 × 3 in
Sizes
40″ BRASS SPIRAL PROBE WITH 6 OPENINGS, 51″ BRASS SPIRAL PROBE WITH 8 OPENINGS, 62″ SPIRAL PROBE WITH 10 OPENINGS, 72″ BRASS SPIRAL PROBE WITH 12 OPENINGS