Details•The principle is based on measuring the highest penetration resistance of a cone over a distance of about 10cm.
•The penetration resistance is measured by means of a compression spring.
•A number of cones and compression springs are available.
•A certain combination of a cone and a compression spring is selected based on the expected penetration resistance.
•If the expected penetration resistance is high, a cone with a small surface is selected and a compression spring with a large maximum force and visa versa.