The Hokuyo LAV series is a laser-based optical fiber type hot metal detector (HMD) that contains a separately housed emitter and receiver, heat-resistant fiber cables and heavy-duty sensor heads. Equipped with high-powered laser diodes, this device operates effectively in high-temperature harsh production areas where dust, steam and vapors are present. With accurate long-range transmission, this through-beam system operates effectively in mill environments by detecting passing material on a process line that interrupts the infrared laser beam.