The Magnetic Ruler is a battery-operated (6ea AAA), data-collection device for the 8 kg Dynamic Cone Penetrometer (DCP). It displays depth, blows, mm/blow, cumulative mm/blow , and cumulative blow/inch in SI and English. The correlations are CBR (California Bearing Ratio) in % and bearing capacity in kips per square foot. A flash drive records the data, information entered by the operator, and date and time for each test via a waterproof USB port.
The sensitive electronics on the vertical scale detect the position of the upper attachment, which slides freely over the vertical scale and is fastened to the drive rod at the other end. This product is accurate to 1 mm.
Printer – A battery operated printer is available in a rugged pelican case at an additional cost.