Sondeerstang penetrometer, Ø 8mm, 100cm
Conus, 1 cm2, 30 °
https://production.royaleijkelkamp.com/shop/d0042642-conus-1-cm2-30-deg-27026
https://production.royaleijkelkamp.com/web/image/product.template/27026/image_1920?unique=9730073
Sondeerconus, basisoppervlakte 1 cm2, tophoek 30°.
