Four-arm Caliper Logging Tool (ECAL70) The Four-arm Caliper Logging Tool (ECAL70) is use to log the borehole radius through its four arms that drives the pot inside the tool, and transfer the borehole radius changes to electric signal. It’s circuit is integrated in the Digital Acoustic Logging Tool (EDAT70), will be place on top EDAT70.

Diameter: 2.87in (73mm)

Log