In addition to mechanical and electronic cones, a variety of other CPT-implemented tools have been developed over the years to provide additional subsurface information. A common tool advanced during CPT testing is a set of geophones to collect seismic shear waves and compression wave velocities. These data help determine the shear modulus and Poisson's ratio at intervals through the soil column for soil liquefaction analysis and low-stress soil strength analysis. Engineers use shear wave velocity and shear modulus to determine soil behavior under low-stress and vibratory loads. Additional tools such as laser-induced fluorescence,

An additional CPT deployed tool used in Great Britain, the Netherlands, Germany, Belgium and France is a piezocone combined with a triaxial magnetometer. This is used to try to ensure that testing, drilling and piles do not encounter unexploded ordnance (UXB) or debris. The magnetometer in the cone detects ferrous materials of 50 kg or more within a radius of up to approximately 2 m away from the probe depending on the material, orientation and ground conditions.

CPT for geotechnical applications was standardized in 1986 by ASTM Standard D 3441 (ASTM, 2004). ISSMGE provides international standards on CPT and CPTU. Later, ASTM standards have addressed the use of CPT for various environmental site characterization and groundwater monitoring activities. For geotechnical soil investigations, CPT is more popular compared to SPT as a geotechnical soil investigation method. Its increased accuracy, speed of deployment, more continuous soil profile and reduced cost over other soil testing methods. The ability to advance additional in-situ test tools using the CPT direct drilling platform, including the seismic tools described above, are accelerating this process.

In addition to mechanical and electronic cones, a variety of other CPT-implemented tools have been developed over the years to provide additional subsurface information. A common tool advanced during CPT testing is a set of geophones to collect seismic shear waves and compression wave velocities. These data help determine the shear modulus and Poisson's ratio at intervals through the soil column for soil liquefaction analysis and low-stress soil strength analysis. Engineers use shear wave velocity and shear modulus to determine soil behavior under low-stress and vibratory loads. Additional tools such as laser-induced fluorescence,

An additional CPT deployed tool used in Great Britain, the Netherlands, Germany, Belgium and France is a piezocone combined with a triaxial magnetometer. This is used to try to ensure that testing, drilling and piles do not encounter unexploded ordnance (UXB) or debris. The magnetometer in the cone detects ferrous materials of 50 kg or more within a radius of up to approximately 2 m away from the probe depending on the material, orientation and ground conditions.

CPT for geotechnical applications was standardized in 1986 by ASTM Standard D 3441 (ASTM, 2004). ISSMGE provides international standards on CPT and CPTU. Later, ASTM standards have addressed the use of CPT for various environmental site characterization and groundwater monitoring activities. For geotechnical soil investigations, CPT is more popular compared to SPT as a geotechnical soil investigation method. Its increased accuracy, speed of deployment, more continuous soil profile and reduced cost over other soil testing methods. The ability to advance additional in-situ test tools using the CPT direct drilling platform, including the seismic tools described above, are accelerating this process.