Although significant progress has been made in pharmacological and device-based treatments for heart failure (HF), it remains an escalating public health challenge, closely associated with high disability rates, frequent hospital readmissions, and substantial economic burden. Alleviating pulmonary edema is one of the core goals in HF treatment. However, clinical practice currently lacks an assessment method capable of rapidly, non-invasively, and precisely quantifying pulmonary fluid content. The emergence of remote dielectric sensing (ReDSTM ) technology provides a novel solution, enabling non-invasive quantitative measurement of pulmonary fluid percentage within minutes, offering an innovative tool for volume management in HF patients. This article aims to systematically review the working principles of this technology, as well as its clinical applications and research advances in the volume management of HF patients.