Gravity Corer

As the name suggests, the gravity corer uses its own weight during deployment to penetrate the seabed and collect sediment samples. Generally, the heavier the corer, the deeper it can penetrate. However, when encountering harder substrates, there is a higher risk of the corer’s tube bending. On sandy seabeds, the sand sediments may more easily flow out from the bottom.

Currently, we have three gravity corers weighing approximately 1 ton, 450 kg, and 150 kg respectively. The steel pipe lengths are either 6 meters or 4 meters (the 150 kg corer uses a 3-meter pipe). The plastic sampling tubes used have an inner diameter of 67 mm.