Bell & Gossett’s Series e-80 Integrated Technologic Sensorless Control variable-frequency drive can be added to the highly efficient Series e-80 vertical inline close-coupled or Series e-80SC split-coupled inline centrifugal pumps. It lowers operating costs to better match demands of hydronic heating and cooling systems to prolong the overall product life. The drive combines the energy savings of variable flow with sensorless technology to eliminate the cost and time of using wired transducers and sensors, while delivering a broad efficiency range in an in-line configuration.