Caliper or Geometry Pigs is designed to record geometry or condition of the pipeline such as dents, buckles, wrinkles, ovality, bend radius and angle, etc. by making measurement of inside surface of the pipeline, using mechanical arms, when it travel through the pipeline.
Caliper Pig will have legs or Mechanical Arm to measure Inside Diameter of Pipe. Surrounding with an Odometer attached to the Caliper Pig to run inside of the pipe. Caliper Pig or Geometry Pig can check dents (deformation) and roundness (ovality) of the Pipeline throughout the length of the pipeline by Mechanical Arm measurements include the ability to show the location of Defect from the Odometer.
Caliper Pig is measured Inside Diameter of Pipe and display as 3D model of pipe-section with Inside Diameter, Dent area as well as the location of section that used to dig and search for repair.