An Anchor Sub is used when you have Wireline or TEC cable inside coiled tubing, and there is a need to do a flow through application like milling, or pressure setting a packer.
Smart-Link is a downhole sensor system used to provide real-time information about downhole conditions during milling and various other operations, it is for use on E-coil.
The Smart-Link DH (Down Hole) includes an integrated cable head, sensor suite, processing electronics and telemetry section. The sensor suite includes measurements for: circulation and annulus pressure; tool temperature; vibration and shock in the axial and lateral directions; torque; and weight on bit.