This tester, designed to measure the undrained shear strength (CU) of cohesive soils, consists of a cylindrical body with a torsional spring and three interchangeable vanes of different sizes used depending upon the expected strength of the soil. The vanes have the following dimensions:
- small size 32x16 mm (height x dia.)
- medium size 40x20 mm (height x dia.)
- large size 50.8x25.4 mm (height x dia.)
The heightdiameter ratio of all vanes is 2. During operation the vane is driven for 5-6 cm into the soil and then turned with the handle. Deep measures (i.e. on the top of undisturbed samples) can be obtained using the extension rod

This tester, designed to measure the undrained shear strength (CU) of cohesive soils, consists of a cylindrical body with a torsional spring and three interchangeable vanes of different sizes used depending upon the expected strength of the soil. The vanes have the following dimensions:
- small size 32x16 mm (height x dia.)
- medium size 40x20 mm (height x dia.)
- large size 50.8x25.4 mm (height x dia.)
The heightdiameter ratio of all vanes is 2. During operation the vane is driven for 5-6 cm into the soil and then turned with the handle. Deep measures (i.e. on the top of undisturbed samples) can be obtained using the extension rod