The Ramsey DTR 131 Flow/No-Flow Detector is a low-cost, non-invasive, microwave-based instrument that detects and monitors low/no-flow conditions of bulk solids in pipelines, ducts and air-slides, and at transfer points of chutes, conveyor belts and bucket elevators. This real-time flow information allows you to monitor processes closely and leads to increased reliability, higher quality end product, reduced downtime and fewer hazards to jeopardize operators and equipment.