CONE PENETROMETER

As per IS: 2720 (part v)

For determining the Liquid Limit of soils. This is specially useful to obtain reliable and accurate results for those soils which have low plasticity index. The percentage moisture contents determined when cone with half angle of 15-30 minutes under a total sliding weight of 148 gm penetrates 25 mm gives the Liquid Limit complete set with timer , penetration test cone and  penetration test cup.