The inspection vane tester is used to measure the in situ undrained shear strength in clays. It is primarily intended for use in trenches and excavations at a depth not influenced by drying and excavation procedure.

The range of the instrument is from 0 to 260 kPa when three different sized vanes are used. The accuracy of the instrument should be within 10% of the reading. The measuring part of the instrument is a spiral-spring (3), (max. torque transmitted 38 kgcm). When the handle (1) is turned, the spring deforms and the upper part (4) and the lower part (8) of the instrument get a mutual angular displacement. The size of this displacement depends on the torque which is necessary to turn the vane (11). By means of a graduated scale (5) the shear strength of the clay is obtained. The lower and upper halves of the instrument are connected by means of threads. The scale (5) is also supplied with threads and follows the upper part of the instruments by means of two lugs. The 0-point is indicated by a line on the upper part (4). When torque is applied, the scale-ring follows the upper part of the instrument and when failure is obtained, the scale-ring (5) will remain in its position due to friction in the threads

Spare parts
• 16-T0174/1 Spring torque meter 1 pcs
• 16-T0174/2 Extension rod 6 pcs L=0.5 m, 0 = 10 mm
• Vane 3 pcs
16-T0174/31 32x16 mm(height x dia.)
16-T0174/32 40x20 mm(height x dia.)
16-T0174/33 50.8x25.4 mm(height x dia.)
• 16-T0174/3 Dummy 1 pcs
• 16-T0174/4 Spanner 8mm and 17mm each 1 pcs


16-T0175/A Pocket shear vane device

Spare parts
• 16-T0175/1 Sensitive vane adaptor 0-2 N/cm2
• 16-T0175/2 High capacity vane adaptor 0-25 N/cm2
• 16-T0175/3 Standard vane 0-10 N/cm2