Your supplier of high pressure laboratory instruments

Your supplier of high pressure laboratory instruments

PLT-100 Point load tester

ASTM D5731


The point load tester accurately determines the uncorrected point load strength index Is which is then converted to a point load index having a standard equivalent diameter (De) of 50 mm. The corrected Is(50) index enables  rock strength classification; it  can also be used to estimate the uniaxial compressive strength (UCS) and the rock’s anisotropy Ia(50). The device consists of a hydraulic ram, a manual hydraulic pump with a pressure gauge and a rigid two-column crosshead frame.  Pressure applied by the pump displaces a piston carrying the lower conical platen. Pressure is directly read from the digital pressure gauge.  The upper platen is fastened to the crosshead and a fixed graduated scale measures the sample diameter. The apparatus is supplied with front and rear protective shields. A carrying case is also provided to allow safe and efficient transportation.  This instrument follows ASTM D5731 procedures. 



ASTM D5731

Load capacity

100 kN

Maximum sample size

4 inches (101.6 mm)

Pump pressure

70 Mpa

Pressure accuracy

0.2% FS


25 Kg


50 x 30 x 25 cm


Simple test

Direct reading of specimen diameter

Extreme rigidity

Inexpensive instrument

Portable, easy to carry on-site

Attractive alternative to the UCS test because provides similar data at a lower cost

Video presentation:


Une réalisation